View source for GWR 5700 Class

{{Short description|Class of 0-6-0 pannier tank steam locomotives}}
{{Use dmy dates|date=January 2018}}
{{Use British English|date=January 2018}}
{{Infobox locomotive
| name = Great Western Railway 5700 class
| powertype = Steam
| image = Newport High Street Station geograph-2570159-by-Ben-Brooksbank.jpg
| caption = 4634 at Newport High Street Station in 1954
| designer = [[Charles Collett]]
| builddate = 1929–1950
| ordernumber = See [[#Build details|Build details]] below
| totalproduction = 863
| builder = {{plainlist|
* GWR [[Swindon Works]] (613)
* [[Armstrong Whitworth]] (25)
* [[W. G. Bagnall]] (50)
* [[Beyer, Peacock and Company|Beyer, Peacock & Co.]] (25)
* [[Kerr Stuart]] (25)
* [[North British Locomotive Company|North British Locomotive]] (100)
* [[Yorkshire Engine Company|Yorkshire Engine Co.]] (25)
}}
| whytetype = {{whyte|0-6-0|PT}}
| uicclass = C n2t 
| gauge = {{Track gauge|uksg|allk=on}}
| driverdiameter = {{convert|4|ft|7+1/2|in|m|3|abbr=on}}
| wheelbase = {{convert|15|ft|6|in|m|2|abbr=on}}
| minimumcurve = {{plainlist|
* {{convert|5|chain|0}} normal
* {{convert|4+1/2|chain|0}} slow{{efn|6700-49 – {{convert|4|chain|0}} (normal) and {{convert|3+1/2|chain|0}} (slow).}}
}}
| length = {{convert|31|ft|2|in|m|2|abbr=on}} over [[Buffer (rail transport)|buffers]]
| width = {{convert|8|ft|7|in|m|3|abbr=on}}
| height = {{convert|12|ft|3+1/16|in|m|3|abbr=on}}
| frametype = {{plainlist|
* Type: Inside
* Length: {{convert|27|ft|6|in|m|2|abbr=on}}
* Width: {{convert|8|ft|7|in|m|3|abbr=on}}
}}
| axleload = {{long ton|16|15}}<br />({{convert|16|LT|15|Lcwt|ST|1|abbr=on|disp=output only}}) full{{efn|8750 class – {{long ton|17|0}} <br />({{convert|17|LT|0|Lcwt|ST|1|abbr=on|disp=output only}}), 9700 class – {{long ton|17|4}} <br />({{convert|17|LT|4|Lcwt|ST|1|abbr=on|disp=output only}}).}}
| locoweight = {{long ton|47|10}}<br />({{convert|47|LT|10|Lcwt|ST|1|abbr=on|disp=output only}}) full{{efn|8750 class – {{long ton|49|0}} <br />({{convert|49|LT|0|Lcwt|ST|1|abbr=on|disp=output only}}), and 9700 class – {{long ton|50|15}} <br />({{convert|50|LT|15|Lcwt|ST|1|abbr=on|disp=output only}}).}}
| fueltype = [[Coal]]
| fuelcap = {{long ton|3|6}}<br />({{convert|3|LT|6|Lcwt|ST|1|abbr=on|disp=output only}}){{efn|9700 class – {{long ton|2|16}}<br />({{convert|2|LT|16|Lcwt|ST|1|abbr=on|disp=output only}}).}}
| watercap = {{convert|1200|impgal|abbr=on}}{{efn|9700 class – {{convert|1230|impgal|abbr=on}}.}}
| firearea = {{convert|15.3|sqft|m2|abbr=on}}
| fireboxarea = {{convert|102.3|sqft|m2|abbr=on}}
| tubearea = {{convert|1075.7|sqft|m2|abbr=on}}
| totalsurface = {{convert|1178.0|sqft|m2|abbr=on}}
| boilerpressure = {{convert|200|lbf/in2|MPa|2|abbr=on}}
| boiler = GWR 2301<ref>{{Cite book|last=Champ|first=Jim |title=An Introduction to Great Western Locomotive Development |year=2018|publisher=[[Pen and Sword Books|Pen & Sword Transport]] |isbn=978-1-4738-7784-9|location=Barnsley |oclc=1029234106 |ol=26953051M |page=319 }}</ref>
| pitch = {{Convert|6|ft|11+3/4|in|abbr=on}}
| diameterinside = Barrel: {{Convert|10|ft|3|in|abbr=on}} <br /> Outside diameter: {{Convert|4|ft|5|in|abbr=on}} & {{Convert|4|ft|3+7/8|in|abbr=on}}
| cylindercount = Two, inside
| cylindersize = {{convert|17.5|x|24|in|mm|0|abbr=on}}
| valvegear = [[Stephenson valve gear|Stephenson]]
| valvetype = [[Slide valve]]s
| tractiveeffort = {{convert|22515|lbf|kN|2|abbr=on}}
| operator = [[Great Western Railway|GWR]] » [[British Rail|BR]], [[National Coal Board|NCB]], [[London Transport Executive|London Transport]], [[Stephenson Clarke Shipping|Stephenson Clarke Ltd.]]
| fleetnumbers = See [[#Numbering and liveries|Numbering]] below
| trainheating = steam{{efn|name=6700subclass|6700-79 were built for shunting only and were not fitted with ATC, vacuum braking, and steam heating.}}
| locobrakes = steam
| trainbrakes = vacuum{{efn|name=6700subclass}}
| safety = [[GWR ATC|ATC]]{{efn|name=6700subclass}}
| powerclass = {{plainlist|
* [[Great Western Railway Power Classification|GWR: C]]
* BR: 3F
}}
| axleloadclass = [[Great Western Railway Weight Classification|GWR: Blue until 1950, then Yellow]]
| withdrawndate = 1956–1971
| preservedunits = see [[#Preservation]]
| disposition = 16 preserved, remainder scrapped
| notes = {{notelist}}
}}

The '''GWR 5700 Class''' (or '''57xx class''') is a class of {{Whyte|0-6-0|PT}} [[steam locomotive]] built by the [[Great Western Railway]] (GWR) and [[British Rail]]ways (BR) between 1929 and 1950. With 863 built, they were the most prolific class of the GWR, and one of the most numerous classes of British steam locomotive.{{sfn|le Fleming|1958|p=E78}}{{efn|Le Fleming mentions [[LNWR DX Goods class|LNWR DX]] (943 built) and [[LMS Stanier Class 5 4-6-0|LMS Class 5]] (842 built) among other numerous classes of British steam locomotives. However, he does not mention the [[WD Austerity 2-8-0]] (935 built), possibly because all but three were transported to mainland Europe after [[D-Day]] for use by the [[British Army]], and only 733 of the class later returned to mainline use in the UK.}}

Although officially designated by GWR as "light goods and shunting engines",{{sfn|Jones|2014|p=21}} they were also used for passenger working on branch, suburban, and shorter mainline journeys. They were distributed across most of the GWR network and, after [[Transport Act 1947|nationalisation]] of the railways in 1948, across the [[Western Region of British Railways]], and also other regions. Although not as large as the GWR [[GWR 4073 Class|Castles]] and [[GWR 6000 Class|Kings]], they became just as much of an icon of the GWR, due to their iconic design and quantity.{{sfn|Jones|2014|p=39}}

As a result of the [[History of rail transport in Great Britain 1948–1994#The Modernisation Plan|1955 Modernisation Plan]], the 5700 Class was withdrawn from BR service between 1956 and 1966. Nineteen withdrawn locomotives were sold to the [[London Transport Executive]] and industry, of which ten were later preserved, along with six that were retrieved from scrapyards.

== Background ==
The GWR started designing and building 0-6-0 tank locomotives in 1860,{{sfn|le Fleming|1958|p=E12}} and this continued into the BR era until 1956, with a total of 2,393 being built.{{sfn|le Fleming|1958|p=E4}} The GWR also used 0-6-0 tank locomotives from other manufacturers' designs (from its subsidiary and absorbed railways' stock{{sfn|Whitehurst|1973|pp=7–13}}), and since 1898 it always had at least 1,000 tank locomotives in stock.{{sfn|le Fleming|1958|p=E4}}

The early 0-6-0 tank engines were fitted with either [[Tank locomotive#Saddle tank|saddle tank]]s (wrapped over the boiler) or [[Tank locomotive#Side tank|side tank]]s (mounted at the side of the boiler and reaching down to the running platform). The Great Western first fitted pannier tanks (mounted on the side of the boiler but not reaching down to the running platform) in 1898 to a single [[4-4-0T]] locomotive, [[GWR No. 1490|No. 1490]],<ref>{{Cite web
  |title=The Universal Saddle Bag? Part 6: Mutant Monster Panniermania!
  |series=Going Loco - October 2022
  |date=28 October 2022
  |url=https://didcotrailwaycentre.org.uk/article.php/531/going-loco-october-2022
  |website=[[Didcot Railway Centre]]
}}</ref> and, in 1901, to two 0-6-4 crane tank locomotives. They started to be fitted to 0-6-0 tanks from 1903, but weren't being fitted more generally until about the end of 1909.{{sfn|le Fleming|1958|p=E7}} The shape of the Belpaire firebox gives a larger surface area which improves heat transfer and steam production,{{sfn|Jones|2014|p=12}} but their rectangular shape made them difficult to combine with saddle tanks.{{sfn|Holcroft|1957|p=82}} Locomotives fitted with pannier tanks have a lower centre of gravity than those with saddle tanks (enabling higher speeds on curves),{{sfn|Holcroft|1957|p=82}} and access for maintenance is easier than for those fitted with side tanks.{{sfn|Herring|2000|p=122}}

[[George Jackson Churchward]]'s period as [[Chief Mechanical Engineer]] from 1901 to 1921 is well known for significant improvements in locomotive design and manufacture,{{sfn|Holcroft|1957|pp=81–82}} and the development of standard designs.{{sfn|Chacksfield|2002|p=24}} However, the scope of the standard designs did not include the 0-6-0 tank locomotive,{{sfn|Chacksfield|2002|p=89}} and the GWR did not introduce any new 0-6-0 tank designs from 1897 to 1928 (with exception of the [[GWR 1361 Class|1361 Class]] of five 0-6-0 saddle tanks in 1910).{{sfn|Holcroft|1957|pp=127–8}}

However, pannier tanks and Belpaire fireboxes became the standard for the rebuilding of various 0-6-0 tank locomotives (projected in 1902 and getting fully underway by 1910).{{sfn|le Fleming|1958|p=E4}} The rebuilding program also included a number of other changes including:
* improved cab designs, eventually becoming fully enclosed{{sfn|le Fleming|1958|p=E10}}
* superheating, which by 1929, had been found to have little benefit on shunting engines{{sfn|le Fleming|1958|p=E78}} 
* adaptation for working with [[GWR Autocoach|autocoaches]] for [[push–pull train]]s (auto-working){{sfn|le Fleming|1958|p=E4}}
* increasing boiler pressures, for example, the various rebuilds of the [[GWR 2721 Class|GWR 2721 class]] started at {{convert|150|lbf/in2|MPa|2|abbr=on}}, increasing to {{convert|165|lbf/in2|MPa|2|abbr=on}}, and then to {{convert|180|lbf/in2|MPa|2|abbr=on}}{{sfn|le Fleming|1958|pp=E68, E69}}

With the completion of grouping in 1923, GWR's collection of 0-6-0 tank locomotives was expanded with the stock from 28 acquired companies. The acquired tank locomotives came from different manufacturers, were a mixture of side, saddle and pannier, and varied widely by size and state of repair.{{sfn|Jones|2014|pp=20–21}}{{sfn|Chacksfield|2002|p=87}} In addition, GWR's stock was wearing out,{{sfn|Chacksfield|2002|p=89}} and the variety of classes was problematic for maintenance and rostering.{{sfn|Semmens|1985|p=66}} Collett had to produce a new standard design for 0-6-0 pannier tanks,{{sfn|Jones|2014|p=21}} which resulted in the 5700 Class.

==Design==

The first batch of 300 locomotives built between 1929 and 1931 included a medium height chimney, a mid-boiler dome, safety valve with cover, and an enclosed cab. They were similar in appearance and design to older 0-6-0 tank engines that had been rebuilt as pannier tanks, particularly the later rebuilds of the [[GWR 1854 Class|1854 Class]], retaining the latter's 'four down, two up' layout of springing, longer smokebox and forward-mounted chimney (necessitated by the re-positioning of the regulator within the smokebox). The 17 1/2 cylinder and 4 ft. 7 1/2 in. wheels diameters of the later '2721' class were adopted and the leading frame overhang was extended from 4 ft. 9 in. to 5 ft. 6 in.; the frames were strengthened (and altered in configuration to 'marry up' with the longer smokebox, unlike the '1854' rebuilds) and the injectors, valances, and wheel centres redesigned (in the latter case a 14-spoke offset crankpin arrangement was substituted for the earlier 16-spoke in-line one).The  [[GWR 1854 Class|1854 Class]], was based on the [[GWR 645 Class|645 Class]].{{sfn|le Fleming|1958|p=E78}}

===Specification===

The table below gives the technical specifications of the 5700 class. Values are from GWR diagram B48{{sfn|Whitehurst|1973|p=146}} unless referenced otherwise.

{|class="wikitable" summary="A table with two columns showing sixteen technical specifications. The first column gives the type of specification and the second column gives the values."
|+ 5700s technical specifications
<!--*** New Row *************************************************************-->
|-
! style="text-align: right;" | Dimensions
| {{flatlist|
* Length over buffers: {{convert|31|ft|2|in|m|2|abbr=on}}
* Width: {{convert|8|ft|7|in|m|2|abbr=on}}
* Height: {{convert|12|ft|3+1/16|in|m|2|abbr=on}}}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Firegrate area
| {{convert|15.3|sqft|m2|abbr=on}}
<!--*** New Row *************************************************************-->
|- 
!  style="vertical-align:top; text-align:right;"| Firebox
| {{plainlist|
* Outside: {{convert|5|ft|4|in|m|2|abbr=on}} x {{convert|4|ft|7+3/8|in|m|2|abbr=on}} and {{convert|4|ft|0|in|m|2|abbr=on}}
* Inside: {{convert|4|ft|7+3/16|in|m|2|abbr=on}} x {{convert|3|ft|8|in|m|2|abbr=on}} and {{convert|3|ft|3+3/4|in|m|2|abbr=on}}
* Height: {{convert|6|ft|0+1/2|in|m|2|abbr=on}}}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Tubes
|  {{flatlist|
* 2 off diameter {{convert|5+1/8|in|m|2|abbr=on}}
* 233 off diameter {{convert|1+5/8|in|m|2|abbr=on}}
* Length: {{convert|10|ft|6+13/16|in|m|2|abbr=on}}}}
<!--*** New Row *************************************************************-->
|- 
!  style="vertical-align:top; text-align:right;"| Heating surface
| {{plainlist|
* Tubes: {{convert|1075.7|sqft|m2|abbr=on}}
* Firebox: {{convert| 102.3|sqft|m2|abbr=on}}
* Total: {{convert|1178.0|sqft|m2|abbr=on}}}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Boiler
| {{flatlist|
* Barrel: {{Convert|10|ft|3|in|abbr=on}}
* Outside diameter: {{Convert|4|ft|5|in|abbr=on}} & {{Convert|4|ft|3+7/8|in|abbr=on}}
* Pitch: {{Convert|6|ft|11+3/4|in|abbr=on}}}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Working pressure
| {{convert|200|lbf/in2|MPa|2|abbr=on}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Cylinders
| {{flatlist|
* Two
* Inside
* Diameter: {{convert|17+1/2|in|m|2|abbr=on}}
* Stroke: {{convert|24|in|m|2|abbr=on}}
}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Valve gear 
| [[Stephenson valve gear|Stephenson]] (slide){{sfn|Herring|2000|p=123}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Wheels
| {{convert|4|ft|7+1/2|in|m|3|abbr=on}} diameter, coupled
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Wheelbase
| 15&nbsp;ft 6 in (7&nbsp;ft 3 in + 8&nbsp;ft 3 in) ({{convert|15|ft|6|in|m|2|abbr=on|disp=out}} ({{convert|7|ft|3|in|m|2|abbr=on|disp=out}} + {{convert|8|ft|3|in|m|2|abbr=on|disp=out}}))
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Tractive effort (85%)
| {{convert|22515|lbf|kN|2|abbr=on}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Coal capacity
| {{long ton|3|6}}{{sfn|le Fleming|1958|p=E78}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Water capacity
| {{convert|1200|impgal|abbr=on}}
<!--*** New Row *************************************************************-->
|- 
!  style="vertical-align:top; text-align:right;"| Weight (full)
| {{plainlist|
* First axle: {{long ton|16|15}}
* Second axle: {{long ton|16|15}}
* Third axle: {{long ton|14|0}}
* Total: {{long ton|47|10}}}}
<!--*** New Row *************************************************************-->
|- 
! style="text-align: right;" | Minimum curve
| {{flatlist|
* Normal: {{convert|5|chain}}
* Slow: {{convert|4+1/2|chain}}{{sfn|le Fleming|1958|p=E77}}}}
|}

The 5700s were given the [[Great Western Railway Weight Classification|GWR route colour]] Blue{{efn|In 1950, the route classification was changed to Yellow because of the 5700s' low [[hammer blow]].{{sfn|le Fleming|1958|p=E79}}}} (based on axle load), and were in the [[Great Western Railway Power Classification|GWR power group]] C (based on tractive effort).{{sfn|le Fleming|1958|p=E80}} The classifications were shown on the cab with the letter C in a blue disc.

le Fleming describes the 5700 class as "an almost unaltered continuation of the 27xx rebuilds"{{sfn|le Fleming|1958|p=E78}} and Holcroft describes them as "practically identical to 2721 rebuilds",{{sfn|Holcroft|1957|p=147}} but according to [[O. S. Nock|Oswald Nock]] it was "a thoroughly modern design",{{sfn|Nock|1972|p=115}} and Jones notes that design included "numerous detailed improvements" and reflected improved construction techniques.{{sfn|Jones|2014|p=36}} The main differences from the 2721 class include:

*increased boiler pressure,{{sfn|Chacksfield|2002|p=88}} from {{convert|180|lbf/in2|MPa|2|abbr=on}}{{sfn|le Fleming|1958|p=E69}} to {{convert|200|lbf/in2|MPa|2|abbr=on}},{{sfn|le Fleming|1958|p=E78}} giving a corresponding increase in [[tractive effort]]
*improved valve settings{{sfn|Chacksfield|2002|p=88}}
*longer frame, from {{convert|26|ft|9|in|m|2|abbr=on}}{{sfn|Whitehurst|1973|p=155}} to {{convert|27|ft|6|in|m|2|abbr=on}}{{sfn|Whitehurst|1973|p=146}} 
*fully enclosed cab{{sfn|Chacksfield|2002|p=88}}

The initial design also included a return to non-fluted coupling rods and laminated springs beneath the leading and driving axleboxes (both features harking back to the 1854 class).{{sfn|le Fleming|1958|p=E78}} The locomotives were also fitted with cast iron chimneys (which had only rarely been fitted to earlier locomotives),{{sfn|le Fleming|1958|p=E78}} and the whistles were fitted on top of the firebox rather than on top of the cab.

===6700 Sub-class===

Of the first batch of 300 locomotives, most were fitted with vacuum brakes and steam heating, and some of these were also fitted with GWR's Automatic Train Control (ATC) safety system.{{efn|Apart from the locomotives built specifically for shunting, the fitting of vacuum brakes, steam heating, and ATC became standard for the class, and was added to earlier locomotives within a few years of building. For locomotives build by outside contractors, the ATC equipment was added on arrival at Swindon.{{sfn|le Fleming|1958|p=E78}}}}

However, the 50 locomotives of the '''6700''' or '''67xx Class''' were not fitted with vacuum brakes, steam heating, or ATC, and were fitted with three link couplings only; they were therefore limited to shunting duties and some freight working.{{sfn|Jones|2014|p=43}} The 6700s had a smaller [[minimum railway curve radius]] of {{convert|4|chain}} (normal) and {{convert|3+1/2|chain}} (slow) and an increased axle clearance.

===8750 Sub-class===

The '''8750''' or '''87xx Class''' were first built in 1933, using an updated design which included an improved cab with a higher roof, rectangular windows and grills (as opposed to the round windows (or "spectacles") of the initial design), and sliding shutters and hinged doors for more protection from the elements.{{sfn|le Fleming|1958|p=E79}} The new style cab was derived from the sister [[GWR 5400 Class|5400 Class]], the first of which were built in 1931.{{sfn|Jones|2014|p=43}} Vacuum brakes, steam heating, and ATC were fitted as standard (except for Nos. 6750–79, built between 1946 and 1950, which were fitted with steam brakes and three link couplings only).{{sfn|le Fleming|1958|p=E79}} The locomotive weight increased to {{long ton|49|0}}, and the axle load increased to {{long ton|17|0}}.{{sfn|le Fleming|1958|p=E79}}

=== 9700 Class ===
[[File:Paddington Pannier tank geograph-2958216-by-Ben-Brooksbank.jpg|thumb|right|alt=A pannier tank locomotive adapted for underground working. The pannier tank shown is shorter than usual, starting behind the smokebox and after about a third of its length extends down to the footplate. At the front there is a pump and extra pipe work, which also extends above the boiler.|No. 9701 at Paddington, showing the modified tanks and condensing apparatus]]

The '''9700''' or '''97xx Class''' pannier tanks were a direct development of the 5700 class. The prototype for the class, No. 8700 (later No. 9700), was a rebuilt 5700 locomotive.{{sfn|le Fleming|1958|p=E78}} They were specifically for working on the [[Hammersmith & City line]] between [[Paddington tube station (Circle and Hammersmith & City lines)|Paddington station]] and [[Smithfield, London#Victorian Smithfield: meat and poultry market|Smithfield Meat Market]]. They replaced [[GWR 455 Class|Metro]] and [[GWR 633 Class|633 class]] locomotives.

The eleven locomotives in the class had a [[Condensing steam locomotive|condensing apparatus]] that fed the exhaust steam back into the water tanks.{{sfn|Jones|2014|p=44}} The tanks themselves were shortened to make room for the external exhaust pipes and were extended down to the footplate in front of the cab to increase their capacity.{{sfn|Jones|2014|p=44}} As condensing the steam heated the water, a reciprocating pump [[Weir Group|(Weir pump)]] was fitted as a [[boiler feedwater pump]] because standard [[injector]]s will not work with hot water.{{sfn|Jones|2014|p=44}} The pumps led to (unsuccessful) tests with these locomotives acting as [[firefighting apparatus|fire engines]] during [[World War II]].

To work over the electrified underground lines, the 9700 Class locomotives had a special type of [[Automatic train control#United Kingdom|ATC]] equipment that lifted clear of the centre rail and had [[Train stop|tripcock]] brake valves that matched the London Transport signalling system.{{sfn|le Fleming|1958|p=E79}}{{sfn|Jones|2014|p=44}} The design changes resulted in reduced coal ({{long ton|2|16}}) capacity and a slight increase ({{convert|1230|impgal|abbr=on}}) in water capacity.{{sfn|le Fleming|1958|p=E79}} The locomotive weight increased to {{long ton|50|15}}, and the axle load increased to {{long ton|17|4}}.{{sfn|le Fleming|1958|p=E79}}

===Later developments===

From 1936 to 1942, a number of small changes were introduced to new builds:

*In 1936, a whistle shield was added to the front of the cab to deflect steam away from the cab windows.{{sfn|le Fleming|1958|p=E79}}
*Also in 1936, pocket steps and extra railings were added to the fireman's side (left side) of the cab to improve access to the bunker.{{sfn|le Fleming|1958|p=E79}}
*In 1937, a drawing was issued for fitting shutters and doors to the older, pre-8750 class, locomotives.{{sfn|le Fleming|1958|p=E79}}
*In 1938, a larger whistle shield was fitted, which became standard for the larger cabs.{{sfn|le Fleming|1958|p=E79}}
*In 1942, a new type of top feed was introduced, with separate clackboxes in a taller cover, and internal delivery pipes rather than trays.{{sfn|le Fleming|1958|p=E79}}

All these changes (with the exception of the new top feed) were later applied to locomotives that had been built earlier. The new top feed became standard for new locomotives in 1944. Some older boilers and locomotives were later fitted with the new top feed, and some locomotives that were built with the new top feed were later changed back to the old design as boilers were swapped.{{sfn|le Fleming|1958|p=E79}}

===Variants===

A small number of 5700s were adapted for specific tasks:

*From 1937 to the end of World War II, thirteen 5700s were fitted with [[spark arrestor#Steam|spark arresting chimneys]] for work on industrial and military sites with significant fire risks.{{sfn|le Fleming|1958|p=E79}}{{sfn|Jones|2014|p=44}}{{efn|The modified chimney was sometimes referred to as a 'Busby' or a 'bird cage'.{{sfn|le Fleming|1958|p=E79}}{{sfn|Jones|2014|p=44}}}}
*In 1958, No. 3711 was [[GWR oil burning steam locomotives|converted to oil burning]] by [[Robert Stephenson and Hawthorns]].{{sfn|Jones|2014|p=46}}{{efn|GWR had experimented with converting steam locomotives to oil burning in 1946–50 but the 5700s had not been included.{{sfn|Whitehurst|1973|p=98}}}}
*In 1946, No. 7722 was fitted with winding gear to work the [[Taff Vale Railway#Rhondda Fach|Pwllyrhebog Colliery incline]] on the former [[Taff Vale Railway]].{{sfn|le Fleming|1958|p=E78}}{{sfn|Jones|2014|p=46}}

== Production ==

The first 5700s were built in 1929 by [[North British Locomotive Company|North British Locomotive Co.]] and, later in the year, at GWR's [[Swindon Works]].{{sfn|le Fleming|1958|p=E77}} Between 1929 and 1931 a total of 300 were built, of which 50 were built by GWR, and the rest by outside contractors:

* [[Armstrong Whitworth]]: 25 (Nos. 7775–99)
* [[W. G. Bagnall]]: 50 (Nos. 6700–24, 8725–49){{efn|Reputedly, Collett had never heard of W. G. Bagnall before the use of contractors was considered.{{sfn|Atkins|1999|p=37}}}}
* [[Beyer, Peacock and Company|Beyer, Peacock & Co]]: 25  (Nos. 8700–24)
* [[Kerr Stuart]]: 25 (Nos. 7700–24)
* North British: 100 (Nos. 5700–49, 7725–74)
* [[Yorkshire Engine Company|Yorkshire Engine Co]]: 25 (Nos. 6725–49)

It was unusual, but not unprecedented, for GWR to use outside contractors to build locomotives, as 50 of the 200 strong [[GWR 5600 Class|5600 Class]] had been built by [[Armstrong Whitworth]].{{efn|GWR ordered a total of 306 locomotives from outside contractors between 1923 and 1938.{{sfn|Atkins|1999|p=37}}}}{{sfn|Chacksfield|2002|p=87}} The building programme was partly funded by interest-free government loans intended to relieve unemployment during the [[Great Depression in the United Kingdom|Great Depression]].{{sfn|le Fleming|1958|p=E78}} Also, stricter accountancy rules that distinguished between maintenance and building costs meant that it was often economically worthwhile to build new locomotives rather than repair older locomotives.{{sfn|Gibson|1984|p=147}}

At first more 5700s were built than were immediately needed, so Nos. 6700–49 were stored for a couple of years before being allocated.{{sfn|le Fleming|1958|p=E78}} Many of these were then assigned to sheds near the South Wales ports of Newport, Barry, Cardiff and Swansea.{{sfn|le Fleming|1958|pp=E79-E80}}

After a gap of a year, building started again in 1933, with the 8750 and 9700 classes, and continued until 1950.{{sfn|le Fleming|1958|pp=E77-E78}} All the later locomotives, totalling 563, were built at Swindon, and the numbers built only dropped in the last few years with the introduction of the [[GWR 9400 Class|9400 class]] in 1947.

===Numbers built===

A total of 863 5700s were built and the table below shows the number built by year.{{sfn|le Fleming|1958|p=E78}}
{|class="wikitable" summary="The table is organized with two rows giving the year and numbers of locomotives built."
|+ Number of 5700s built by year{{sfn|le Fleming|1958|pp=E80-E81}}
<!--*** New Row *************************************************************-->
|- 
! Year
| 1929
| 1930
| 1931
| 1932
| 1933
| 1934
| 1935
| 1936
| 1937
| 1938
| 1939
| 1940
| 1941
| 1942
| 1943
| 1944
| 1945
| 1946
| 1947
| 1948
| 1949
| 1950
<!--*** New Row *************************************************************-->
|- 
! Numbers
| 97
| 138
| 65
| 0
| 31
| 49
| 40
| 45
| 50
| 37
| 53
| 32
| 18
| 37
| 26
| 22
| 43
| 29
| 10
| 17
| 14
| 10
|}

===Build details===

The 5700s were specified by 27 different order numbers, or lots, shown below.

{| class="wikitable sortable" summary="A six column table arranged by date."
|- valign="top"
! style="width:16%;"| Date 
! style="width:6%;"| Lot No.
! style="width:6%;"| No. Built
! style="width:6%;"| GWR/BR Numbers
! style="width:20%;"| Builder and Numbers
! style="width:46%;" class="unsortable"| Notes{{sfn|le Fleming|1958|pp=E77-E81}}
<!--*** New Row *************************************************************-->
|- valign="top"
| data-sort-value="192901" | Jan–Apr 1929
| 256
| 50
| 5700–49
| [[North British Locomotive Company|North British Locomotive Co.]] 
23818–67{{efn|group=lower-roman|name=NBL Builds|Nos. 5700–24 were built at Hyde Park. All other locomotives from North British Locomotive Co. were built at Queens Park.{{sfn|le Fleming|1958|pp=E77-E78}}}}
| Built with vacuum brakes, but without steam heating apparatus or [[Automatic Train Control#GWR ATC|ATC (Automatic Train Control)]], which were both added later. 
Delivered with brass number plates (as were all later locomotives built by outside contractors).
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="192904" | Apr–Sep 1929
| 258
| 30
| 5750–79
| [[Swindon Works]], [[Great Western Railway|GWR]]
| Built with vacuum brakes and steam heating. Fitted with ATC in the following few years.{{efn|group=lower-roman|Ten locomotives (Nos. 5768 and 5770–78) were fitted with boilers where the steam supply to the fountain in the cab was taken in a covered pipe along the tank top from the dome. This feature was later discontinued and the boilers replaced.{{sfn|le Fleming|1958|p=E78}}}}
Fitted with cast iron number plates (as were all later locomotives built at Swindon). 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="192912a" | Dec 1929 – Nov 1930
| 260
| 20
| 5780–99
| Swindon Works, GWR
| Built with vacuum brakes and steam heating. Nos. 5790–99 were fitted with ATC. Nos. 5780–5789 were fitted with ATC in the following few years.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="192912b" | Dec 1929 – Feb 1930
| 264
| 25
| 7725–49
| North British Locomotive Co. 
23921–45{{efn|group=lower-roman|name=NBL Builds}}
| Built with vacuum brakes and steam heating. ATC added a few years after delivery.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193001" | Jan–Mar 1930
| 263
| 25
| 7700–24
| [[Kerr Stuart]]
4435–59
| Built with vacuum brakes and steam heating. ATC added a few years after delivery. 
Fitted with riveted tanks{{efn|group=lower-roman|name=rivets|Welding had been standard for GWR panniers for some time.{{sfn|le Fleming|1958|p=E9}} However, the panniers supplied by Bagnall, Kerr Stuart, and Yorkshire Engine were riveted.}} and polished brass safety valve covers. 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193002" | Feb–Oct 1930
| 262
| 25
| 6700–24
| [[W. G. Bagnall]]
2381–2405
| Built with steam brakes only and three link couplings.{{sfn|Jones|2014|pp=140–144}} 
Fitted with riveted tanks.{{efn|group=lower-roman|name=rivets}}
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193003" | Mar 1930 – Jan 1931
| 265
| 25
| 6725–49
| [[Yorkshire Engine Co.]]
2249–73
| Built with steam brakes only and three link couplings.
Fitted with riveted tanks.{{efn|group=lower-roman|name=rivets}}
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193011" | Nov 1930 – Jan 1931
| 271
| 25
| 7775–99
| [[Armstrong Whitworth]]
1131–55
| Built with vacuum brakes and steam heating apparatus (as were all later locomotives). ATC added on arrival at Swindon (as were all later locomotives supplied by contractors).
Fitted with polished brass safety valve covers. 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193012" | Dec 1930 – Sep 1931
| 272
| 25
| 8725–49
| W. G. Bagnall
2422–46
| Fitted with riveted tanks{{efn|group=lower-roman|name=rivets}} and polished brass safety valve covers. 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193102" | Feb–Apr 1931
| 273
| 25
| 8700–24
| [[Beyer, Peacock and Company|Beyer Peacock]]
6680–6704
| Fitted with polished brass safety valve covers. Includes the first No. 8700, which was later modified as the prototype for the 9700 class, and was renumbered No. 9700 in January 1934.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193011" | Nov 1930 – Mar 1931
| 274
| 25
| 7750–74
| North British Locomotive Co. 
24038–62{{efn|group=lower-roman|name=NBL Builds}}
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193311a" | Sep–Dec 1933 
| 282
| 10
| 9701–10
| Swindon Works, GWR
| Built for working on London Transport lines. Built with new style cab, condensing equipment, Weir pump, modified ATC (to lift clear of central rail), and tripcock brake valves.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value=193311b | Sep 1933 – Mar 1934
| 282
| 49
| 8750–98
| Swindon Works, GWR
| Built with new style cab, ATC, steam heating, and vacuum brakes. This was the standard equipment for all later locomotives (with the exception of Nos. 6751–59 (Lot No. 362, 1947) which were for shunting only).
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193403" | Mar 1934
| 282
| 1
| 8700
| Swindon Works, GWR
| The second No. 8700. The first was modified with condensing equipment and new cab as the prototype for the 9700 class. The old cab was saved and fitted to the new No. 8700.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193406a" | Jun 1934
| 285
| 1
| 8799
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193406b" | Jun 1934 – Jun 1935
| 285
| 49
| 9711–59
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193509" | Sep 1935 – Jul 1936
| 293
| 25
| 9760–84
| Swindon Works, GWR
| Whistle shields were introduced (probably first to No. 9773).
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193605" | May 1936 – Sep 1936
| 299
| 15
| 9785–99
| Swindon Works, GWR
| Pocket steps and extra handrails were added to the left of the bunker. First fitted to No. 9795. 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193609" | Sep 1936 – Aug 1937
| 299
| 35
| 3700–34
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193708" | Aug 1937 – Sep 1938
| 306
| 50
| 3735–84
| Swindon Works, GWR
| A larger whistle shield was introduced and first fitted to No. 3774. 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193809" | Sep–Dec 1938
| 314
| 15
| 3785–99
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193812" | Dec 1938 – Jul 1939
| 314
| 35
| 3600–34
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="193909" | Sep 1939 – Jul 1940
| 325
| 50
| 3635–84
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194012" | Dec 1940 – Sep 1941
| 330
| 15
| 3685–99
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194109" | Sep 1941 – Nov 1942
| 330
| 35
| 4600–34
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194212" | Dec 1942 – Jun 1943
| 336
| 26
| 4635–60
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194310" | Oct 1943 – Feb 1945
| 352
| 39
| 4661–99
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194510" | Feb–Oct 1945
| 352
| 22
| 9600–21
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194511" | Nov 1945 – Mar 1946
| 355
| 20
| 9622–41
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194604" | Apr–Jun 1946
| 356
| 10
| 9642–51
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194611" | Nov–Dec 1946
| 362
| 10
| 9652–61
| Swindon Works, GWR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194706" | Jun–Sep 1947
| 362
| 10
| 6750–59
| Swindon Works, GWR
| Built with steam brakes only and three link couplings.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194804" | Apr–Jun 1948
| 370
| 11
| 9662–72
| Swindon Works, BR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194811" | Nov 1948 – Jan 1949
| 374
| 10
| 6760–69
| Swindon Works, BR
|Built with smokebox number plates, as were all later locomotives.
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="194902" | Feb–May 1949
| 378
| 10
| 9673–82
| Swindon Works, BR
| 
<!--*** New Row *************************************************************-->
|- valign="top" 
| data-sort-value="195011" | Nov–Dec 1950
| 379
| 10
| 6770–79
| Swindon Works, BR
| 
|}
{{notelist-lr}}

===Costs===

Some known costs (either GWR's out-shop value or cost from contractors) are shown below, along with estimated equivalent values for 2013.

{| class="wikisortable" " summary="The" number, builder, order, build, cost, cost."
|+ 5700s costs
|- valign="top"
! | GWR No.
! | Builder
! | Date
! | Cost
! | 2013 labour cost{{efn|group=lower-roman|Relative value calculated using a wage index.{{sfn|Officer|Williamson|2012}} Specific values calculated here.{{sfn|Officer|Williamson|2014}}}}
! | 2013 economic cost{{efn|group=lower-roman|Relative value calculated as a proportion of the total output of the economy.{{sfn|Officer|Williamson|2012}} Specific values calculated here.{{sfn|Officer|Williamson|2014}}}}
<!--*** New Row *************************************************************-->
|- 
| 5764
| [[Swindon Works]], [[Great Western Railway|GWR]]
| {{dts|1929|Jun}}
| £2,651{{efn|group=lower-roman|For comparison [[GWR 4900 Class 4953 Pitchford Hall|GWR Hall class No. 4953 Pitchford Hall]], also built at Swindon in 1929, cost £4,375.{{sfn|Epping Ongar}}}}{{sfn|Jones|2014|p=151}}
| £419,500
| £894,900
<!--*** New Row *************************************************************-->
|- 
| 7714
| [[Kerr Stuart]]{{efn|group=lower-roman|The 5700s built by Kerr Stuart were amongst the last built by the company.{{sfn|Jones|2014|p=167}} See [[Kerr, Stuart and Company#The company in liquidation|Kerr Stuart in liquidation]] for details.}}
| {{dts|1930|Apr}}
| £1,160{{sfn|Jones|2014|p=165}}
| £185,000
| £398,100
<!--*** New Row *************************************************************-->
|- 
| 7754
| [[North British Locomotive Company|North British Locomotive Co.]]
| {{dts|1930|Dec}}
| £2,800{{sfn|Jones|2014|p=169}}
| £446,500
| £961,000
<!--*** New Row *************************************************************-->
|- 
| 3650
| Swindon Works, GWR
| {{dts|1939|Dec}}
| £2,844{{sfn|Jones|2014|p=149}}
| £414,100
| £761,200
<!--*** New Row *************************************************************-->
|- 
| 4612
| Swindon Works, GWR
| {{dts|1942|Feb}}
| £3,451{{sfn|Jones|2014|p=150}}
| £425,000
| £576,500
<!--*** New Row *************************************************************-->
|- 
| 9682
| Swindon Works, BR
| {{dts|1949|May}}
| £5,280{{sfn|Jones|2014|p=186}}
| £429,900
| £657,200
|}

{{notelist-lr}}

== Numbering and liveries ==
The size of the class demanded that the 5700 class locomotives were spread across several series of numbers.{{sfn|Jones|2014|p=43}}

{{columns-list|colwidth=22em|
*3600 – 3699
*3700 – 3799
*4600 – 4699
*5700 – 5799
*6700 – 6779
*7700 – 7799
*8700 – 8799
*9600 – 9682
*9700 – 9799
}}

The different series started in the following chronological order; 57xx (1929), 77xx (1929), 67xx (1930), 87xx (1931), 97xx (1933), 37xx (1936), 36xx (1938), 46xx (1941), and 96xx (1945).{{sfn|Whitehurst|1973|pp=32–34, 41–42, 51–52, 59–60, 67–68, 71–72, 74–76}} GWR locomotives were not renumbered after nationalisation, but a W (for Western Region) was temporarily added to some locomotives.

The first 5700s built were painted in the standard GWR livery of the time; mainly green above the running plate with the words "GREAT WESTERN" painted in yellow letters with red and black shadowing on the side of the pannier tanks, buffer beams painted red with the number shown in yellow letters with black shadowing, and the front of the smokebox and chimney were black.{{sfn|Elliott|2012a}} From 1934 the GWR "shirtbutton" roundel replaced "GREAT WESTERN".{{sfn|Elliott|2012b}} From 1942 GWR replaced the roundel with the letters "G W R", in yellow letters with red and black shading.{{sfn|Elliott|2012c}} Due to wartime shortages, most locomotives (apart from the [[GWR 6000 Class|Kings]] and [[GWR 4073 Class|Castles]]) were painted black from 1942 to 1945.{{sfn|Bryan|1995|p=147}}

After nationalisation, some 5700s were painted in BR green with the words "BRITISH RAILWAYS" on the side of the pannier tanks,{{sfn|Dare|2011}} but unlined black soon became the standard for tank locomotives, with the BR crest on the sides of the pannier tanks. Some 5700s also had white and red lining on the pannier tanks and cab sides. The BR crest was changed in 1957.{{sfn|Elliott|2012d}}

The 5700s bought by London Transport between 1956 and 1963 were repainted in the standard LT maroon livery with yellow and black lining.{{sfn|Jones|2014|p=86}} Those bought by NCB were painted in a light green.{{sfn|Jones|2014|p=169}}

==Operation==

The 5700s were used on GWR for various duties including shunting, pilot work, and light to medium goods. They were also used on branch, commuter and shorter mainline passenger trains.{{sfn|Jones|2014|p=10}}{{sfn|Jones|2014|p=39}} They were also used on standby for more powerful locomotives, sometimes producing "firework displays" as they strived to keep to the schedule with heavier loads.{{sfn|le Fleming|1958|p=E79}}

The 5700s were never fitted remote control gear for working [[GWR Autotrain|autotrains]]. This was left to smaller pannier locomotives that followed; the [[GWR 5400 Class|5400 Class]] (introduced in 1930) and the [[GWR 6400 Class|6400 Class]] (introduced in 1932).{{sfn|le Fleming|1958|pp=E83-E84}}

The 9700s (fitted with condensing equipment for underground working) and built specifically for working the line between Paddington and Smithfield, were allocated to [[Old Oak Common TMD|Old Oak Common]].{{sfn|le Fleming|1958|p=E80}}

The 6700s (built for shunting only and kept in storage for a couple of years because of a lack of suitable work) eventually found their niche working the marshalling yards between the [[South Wales Coalfield|South Wales coalfields]] and the coal exporting docks of [[North Dock, Llanelli|Llanelli]], [[Swansea docks|Swansea]], [[Cardiff Docks|Cardiff]], [[Barry Docks|Barry]] and [[Newport Docks|Newport]]. Some were allocated to just one shed for their entire working life (Nos. 6700–9 at Cardiff East Dock and Nos. 6725–32 at Newport, Pill). A number of 6700s were also allocated to Swindon, with 6733–41 spending a long time there.{{sfn|le Fleming|1958|p=E80}}

Thirteen 5700s were fitted with [[Spark arrestor#Steam|spark arresting chimneys]] for working in industrial and military systems and sidings, particularly the [[War Department (United Kingdom)|War Department]] ammunition dump at [[Milton, Vale of White Horse#Economic and social history|Milton]], near Didcot during World War II.{{sfn|Jones|2014|pp=45–46}}

The [[Taff Vale Railway#Rhondda Fach|Pwllyrhebog Colliery incline]] on the former [[Taff Vale Railway]]{{sfn|le Fleming|1958|p=E78}} was a {{convert|3/4|mi|km}} 1-in-13 incline with a continuous rope cable so that a descending train was partially counterbalanced by an ascending train. The locomotives ([[Taff Vale Railway H class]]) on the incline were fitted with coned boilers so that there was always sufficient water above the firebox. To provide additional control and power a stationary locomotive, fitted with two intergeared drums, controlled the cable.{{sfn|Jones|2014|p=46}} No. 2750 [[GWR 2721 Class|Class 2721]] had been fitted with the necessary winding gear to control the incline in 1935,{{sfn|le Fleming|1958|p=E69}} but was withdrawn in 1945,{{sfn|le Fleming|1958|p=E70}} and replaced by 5700 No. 7722 which was fitted with the winding gear in 1946.{{sfn|le Fleming|1958|p=E79}} Operation of the incline ended in 1952.{{sfn|Jones|2014|p=46}}

===Allocation===

The 5700s' [[Great Western Railway Weight Classification|route classification]] (Blue) meant that they were allowed on approximately 70% of the GWR network. By 1938 only 15{{efn|The 15 sheds were Abercynon, Aberystwyth, Bristol (Bath Road), Carmarthen, Croes Newydd, Didcot, Ferndale, Fishguard, Machynlleth, Oswestry, Radyr, Treherbert, Truro, Weymouth and Whitland.{{sfn|le Fleming|1958|p=E79}}}} (out of approximately 70) running sheds did not have any 5700s allocated.

In 1950, the route classification was changed to Yellow because of the 5700s' low [[hammer blow]].{{sfn|le Fleming|1958|p=E79}} The change did not apply to Nos. 9700–10. This meant that 5700s were now allowed on almost 90% of the old GWR network (roughly equivalent to the new Western Region of British Rail). By 1954, only five running sheds (Abercynon, Aberystwyth, Machynlleth, Treherbert and Truro) did not have any 5700s allocated.{{sfn|le Fleming|1958|p=E79}}

===BR working===
In the early years of British Railways, the boundaries between the Western and the Southern Region changed a number of times.{{sfn|Jones|2014|p=70}} 5700s took up new duties in a variety of places:
*At Weymouth, 5700s operated the branch line to the Isle of Portland (replacing [[LSWR O2 class]] 0-4-4T locomotives).{{sfn|Jones|2014|p=70}} They were also seen pulling boat trains through the streets of Weymouth.
*Six 5700s were allocated to [[Nine Elms Locomotive Works#Motive power depot|Nine Elms]] and worked empty stock between [[London Waterloo railway station|Waterloo]] and [[Clapham Junction railway station|Clapham Junction]] (replacing [[LSWR M7 class]] 0-4-4T locomotives).{{sfn|Jones|2014|p=70}}
*The short [[Folkestone Harbour railway station#Branch line|Folkestone Harbour branch line]] from [[Folkestone Harbour railway station|Folkestone Harbour station]] to [[Folkestone East railway station|Folkestone Junction]] was always problematic when hauling heavy boat trains up the 1-in-36 incline.{{sfn|Jones|2014|p=72}} Six 5700s were allocated to Dover for working (including [[Bank engine|banking]]) on the branch (replacing [[SER R1 class]] 0-6-0T locomotives).{{sfn|Jones|2014|p=74}}

The last scheduled passenger trains hauled by 5700s on BR were on seen London Midland Region on the Wrexham to New Brighton route (passing over old [[London and North Eastern Railway|LNER]] territory). The Wrexham to Seacombe service ended at the beginning of 1960 but was immediately replaced by a [[Diesel multiple unit|DMU]] service between Wrexham and New Brighton. The service on Bank Holidays was so popular that demand outstripped available DMUs, and a relief train of four coaches pulled by No. 3749 was laid on. Two more 5700s were used over the Spring Bank Holiday that year, but from then [[BR Standard Class 4 2-6-4T]] locomotives usually handled the relief services. In 1965, 5700s were used for the last time on Whit Monday and August Bank Holiday relief services.{{sfn|Jones|2014|pp=76–77}}

The 5700s were the last steam locomotives used on Western Region. The last working locomotives were allocated to [[Croes Newydd]], and were working goods trains and shunting until November 1966.{{sfn|Jones|2014|pp=79–81}}{{efn|Although British Rail had banned steam on its mainlines from August 1968, the 5700s bought by London Transport did sometimes travel on British Rail lines near Lillie Bridge.{{sfn|Scott-Morgan|Martin|2008|p=64}}}} By the end of the steam era, the record keeping of allocations and working of local steam locomotives was rather lax, and it was not unknown for locomotives to be used after being officially withdrawn. For many years Nos. 4646, 4696, and 9774 were thought to be the last ex-GWR locomotives to work on British Rail, but No. 9641 was also still in steam at Croes Newydd at the same time.{{sfn|Jones|2014|p=82}}

===5700s at work===
<gallery mode="packed" heights="120px">
File:Southall station, with up goods passing geograph-2946778-by-Ben-Brooksbank.jpg|alt=A pannier tank locomotive, travelling in reverse, is pulling a train of open and closed goods wagons through a station.|No. 3620 with a typical goods train at Southall station
Didcot Collett '8750' class geograph-2951175-by-Ben-Brooksbank.jpg|alt=A pannier tank locomotive with a conical chimney is pulling a shunter's wagon and guards van.|No. 4601 with spark arresting chimney for shunting at the WD sidings at Milton
File:Weymouth boat train 1 (374393697).jpg|alt=A green pannier tank locomotive is pulling green passenger coaches past a row of parked cars. In the foreground is a harbour with moored pleasure craft. Behind the train is a row of buildings.|A boat train on the quayside at Weymouth with No. 4624
File:Swansea High Street Station, with a GW 0-6-0PT bringing in empty stock geograph-2575887-by-Ben-Brooksbank.jpg|alt=A pannier tank locomotive pulling five passenger coaches through a station|No. 9792 hauling empty stock at Swansea High Street station
File:Newport High Street 2 station geograph-2575019-by-Ben-Brooksbank.jpg|alt=A pannier tank locomotive pulling a train of three wagons through a station. The coaches are a parcel van, a goods wagon, and a passenger coach.|No. 9662 on pilot duty at Newport High Street station
File:Shrewsbury station geograph-2570148-by-Ben-Brooksbank.jpg|alt=A pannier tank locomotive is standing at a station platform and taking on water from a large filling pipe. The fireman is standing on the locomotive. The driver is controlling the water valve, but may have been distracted by the photographer, as water is cascading over the side of the locomotive. A boy watches.|No. 3769 taking on water at Shrewsbury station
File:Southall, Ealing geograph-2575873-by-Ben-Brooksbank.jpg|alt=Two steam engines are passing through a station. On the left is a large passenger express locomotive, and on the right, slightly ahead, is a pannier tank locomotive pulling a goods train of open wagons and a flat bogey. It looks as though the locomotives are racing, but as the plumes of steam from the locomotives are at different angles, the fast express will probably quickly catch up with the pannier and pass it.|No. 9791 racing Castle Class No. 7006 Lydford Castle at Southall
File:Llanelly 2 Locomotive Depot 2073546 ce23d850.jpg|alt=The inside of an engine shed with part of a turntable in the foreground. A number of engines are arranged round the turntable, each with their chimneys under large ventilation cowls.|Llanelly depot - Nos. 7211 (7200 class), 1633 (1600 class), 3642 (5700 class), 1607 (1600 class) and 5722 (5700 class)
</gallery>

==Accidents and incidents==
*On 26 August 1940, a bombing raid destroyed a goods shed at [[Bordesley, West Midlands]]. During the raid Peter Smout, an 18-year-old engine cleaner who was acting as the fireman on a shunter, volunteered to drive No. 7758 to pull wagons out of the blazing goods shed. He made three more trips. He was assisted by Frederick Blake, a wagon examiner and a navy veteran from World War I, who operated the points levers. When they finished, the right hand side of the footplate was too hot to touch, and Blake had to use his hat to work the points as the levers were also too hot to touch. Both men were awarded the [[George Medal]] for their courage.{{sfn|Bryan|1995|p=75}}{{sfn|London Gazette (1941)}}{{efn|During the raid, both men also extinguished fires from incendiary bombs. Frederick Blake was later quoted as saying "these blitzes seem tame to me" (in comparison to his experiences in World War I). His medals were sold in 2007.{{sfn|Dix Noonan Webb}}}}
*On 11 November 1960, whilst hauling an unfitted coal train down a gradient, No. 9737 ran away and collided with a diesel multiple unit at {{rws|Pontrhydyfen}}, Glamorgan. Two people were killed and 20 were injured.<ref name=PontrhydyfenStationInfo2>{{cite report |url=https://www.railwaysarchive.co.uk/docsummary.php?docID=532|title=Report on the Collision which occurred on 24th November 1960 between Pontrhydyfen and Cwmavon in the Western Region British Railways |via=The Railways Archive |access-date=28 March 2021 |last=McMullen |first=D. |date=13 April 1961 }}</ref>
*On 7 December 1961, a locomotive of the class was in collision with a freight train at [[Bodmin General railway station|Bodmin General station]], [[Cornwall]] due to a faulty signal failing to give a clear danger aspect.{{sfn|Earnshaw|1993|p=35}}

== Other pannier tank locomotives ==
There were numerous other classes of pannier tanks built by the GWR. The majority belonged to two "families" of "large" and "small" designs. Others included absorbed stock, more specialised types and conversions of tender locos. The two main groups were:

* A "large" group originally featuring saddle tanks (or in a few cases side tanks), 4&nbsp;ft 6 in driving wheels and double frames e.g. [[GWR 1076 Class|1076 Class]] or inside frames [[GWR 645 Class]], culminating in the [[GWR 9400 Class|9400 Class]].
* A "small" group originally built at [[Wolverhampton railway works|Wolverhampton Works]] with saddle tanks and driving wheels of 4&nbsp;ft commencing with the [[GWR 850 Class]] and culminating in the [[GWR 1600 Class|1600 Class]]

For example, within the "small" group, the [[GWR 5400 Class]] locomotives were derived from the William Dean-designed [[GWR 2021 Class]] (an enlargement of the [[GWR 850 Class|850 Class]]), with larger wheels for higher top speed and fitted with [[GWR Autotrain|autotrain]] apparatus ('auto-fitted') for [[Push-pull train|push-pull]] passenger work. The [[GWR 6400 Class]] were similar to the 5400 Class, also being auto-fitted, but having the same size wheels as the 5700. The [[GWR 7400 Class]] were very similar to the 6400 Class, but were not auto-fitted and had a higher boiler pressure.

Within the "large" group, the [[GWR 9400 Class]] was the post-war updated design of the 8750 variant of the 57xx: heavier and longer, but nominally no more powerful, using the same taper boiler as the [[GWR 2251 Class]].

For a list of classes, see [[GWR 0-6-0PT]].

== Withdrawal and mileages ==

After the [[History of rail transport in Great Britain 1948–1994#The Modernisation Plan|1955 Modernisation Plan]], the reduction in branch line work and the introduction of diesel shunters, the Western Region embarked on a dieselisation programme which, along with a reduction in branch line work, reduced the demand for the services of the 5700s.{{sfn|Jones|2014|p=68}}
Withdrawal from service with BR started in 1956 and was completed in 1966.{{sfn|Whitehurst|1973|pp=32–34, 41–42, 51–52, 59–60, 67–68, 71–72, 74–76}}

Twenty locomotives{{sfn|Whitehurst|1973|pp=82–83}} were sold and continued in use until 1971 by the London Transport and 1975 by the National Coal Board.

{|class="wikitable" summary="The table is organized with two rows giving the year and numbers of locomotives withdrawn."
|+ Withdrawal of 5700s from BR
<!--*** New Row *************************************************************-->
|- 
! Year
| 1956
| 1957
| 1958
| 1959
| 1960
| 1961
| 1962
| 1963
| 1964
| 1965
| 1966
<!--*** New Row *************************************************************-->
|-
! Numbers{{sfn|Whitehurst|1973|pp=32–34, 41–42, 51–52, 59–60, 67–68, 71–72, 74–76}}
| 4
| 16
| 48
| 67
| 67
| 67
| 170
| 114
| 144
| 139
| 27
|}

le Fleming noted that the mileages of those withdrawn between March 1956 and March 1958 ranged "between 500,000 and 556,000".{{sfn|le Fleming|1958|p=E80}} Some other known mileages are shown below.

{|class="wikitable" summary="The table has four columns and seven rows giving the locomotive number in ascending order, date built, date withdrawn, and mileage."
|+ 5700s mileages
<!--*** New Row *************************************************************-->
|- 
! Number
! Built
! Withdrawn
! Mileage
<!--*** New Row *************************************************************-->
|-
| 3650{{sfn|Jones|2014|p=140}}
| Dec 1939
| Sep 1963
| {{convert|493,100|mi|abbr=on}}
<!--*** New Row *************************************************************--> 
|-
| 3738{{sfn|Jones|2014|p=145}}
| Sep 1937
| Jul 1963
| {{convert|500,000|mi|abbr=on}}
<!--*** New Row *************************************************************-->
|-
| 4612{{sfn|Jones|2014|p=150}}
| Feb 1942
| Jul 1965
| {{convert|427,707|mi|abbr=on}}
<!--*** New Row *************************************************************-->
|-
| 5764{{sfn|Jones|2014|p=151}}
| Jun 1929
| (Dec 1963){{efn|group=lower-roman|withdrawn from BR May 1960. Mileage from later LT records.}}
| {{convert|668,771|mi|abbr=on}}
<!--*** New Row *************************************************************-->
|-
| 7714{{sfn|Jones|2014|pp=165–166}}
| Apr 1930
| Jan 1959
| {{convert|520,259|mi|abbr=on}}
<!--*** New Row *************************************************************-->
|-
| 9629{{sfn|P & B Loco Group – 9629's History}}
| Dec 1945
| (Sep 1961){{efn|group=lower-roman|Date of last Heavy General Overhaul (H/G). Withdrawn Oct 1964.}}
| {{convert| 385,188|mi|abbr=on}}
<!--*** New Row *************************************************************-->
|-
| 9682{{sfn|Jones|2014|p=186}}
| May 1949
| Aug 1965
| over {{convert|250,000|mi|abbr=on}}
|}
{{notelist-lr}}

== Use after British Railways ==

Nineteen 5700s were sold for further use after being withdrawn by British Railways. The [[National Coal Board]] (NCB) bought five, one was bought by P.D. Fuels, and thirteen were bought by [[London Transport Executive|London Transport]].{{sfn|Whitehurst|1973|p=82}}

One more locomotive, No. 9642, was withdrawn in 1964 and sold to Hayes Scrapyard. It was used for three years to shunt other locomotives being scrapped, and was later saved for preservation.{{sfn|Whitehurst|1973|p=83}}

=== London Transport ===
[[File:LT loco L92 in 1969.jpg|thumb|right|alt=A pannier tank locomotive is pushing a shunter's wagon and pulling a guard's van. The locomotive is painted in a faded maroon with black and yellow piping, but much of the paint has peeled, revealing the black paint underneath. The lettering "LONDON TRANSPORT" is shown in yellow on the side of the pannier tank.|LT No. L95, 40 years old, shunts at Croxley Tip in autumn 1969]]
Although the [[London Underground]] network had been electrified for many years (the then [[Metropolitan Railway]] was electrified in 1905) a small number of steam locomotives were retained for engineering and ballast trains.{{sfn|Scott-Morgan|Martin|2008|p=15}} By the 1950s, the locomotives were past their prime and expensive to maintain, and the planned quadrupling of part of the [[Metropolitan line]] would require reliable locomotives.{{sfn|Scott-Morgan|Martin|2008|p=16}} London Transport considered replacing the steam fleet with diesel shunters, and had also tested (unsuccessfully) a [[GNR Class J13|Great Northern Railway Class J52]] locomotive in 1955.{{sfn|Scott-Morgan|Martin|2008|p=20}}

The first 5700 locomotive, No. 7711, underwent trials from January to April 1956, first running between [[Finchley Road tube station|Finchley Road]] and [[Baker Street tube station|Baker Street]]. Modifications were needed to the cab for clearance and the [[Train stop|tripcock]] brake valves after problems were found when running in reverse. Curtains were also fitted to the cab to reduce smoke and fumes in tunnels. In May, the 5700s became the standard for engineering trains on London Transport when they bought No. 7711 (for £3,160), decided to buy another (No. 5752), and planned to buy more over the coming years.{{sfn|Jones|2014|p=88}}

Thirteen 5700s were bought by London Transport (from 1956 to 1963).{{sfn|Whitehurst|1973|p=82}} They were numbered L89 to L99 and were allocated to the depots at [[Lillie Bridge Depot|Lillie Bridge]] ([[Fulham]]) and [[Neasden Depot|Neasden]].{{sfn|Ferris|1995|p=23}} Only eleven were running at any one time, the original L90 and L91 were withdrawn for repairs but scrapped instead and replaced by other locomotives which carried the same number.{{sfn|Casserley|1979|p=95}}

They worked [[permanent way]] trains and were never used on normal passenger services. Main line running included trips between depots, to [[Acton Works]] and runs out to Croxley Tip, near Watford.{{sfn|Jones|2014|p=89}}

Three of the LT 5700s lasted until the end of steam on London Transport in 1971 and were the last steam locomotives used for regular mainline working in the UK.{{sfn|Jones|2014|p=96}}{{efn|Steam locomotives are now often seen on British mainline railways, but only as ''specials''. Ferris{{sfn|Ferris|1995|p=23}} also mentions the [[NCC Class WT|WT Class 2-6-4Ts]] operated by [[Northern Ireland Railways]] as being amongst the last steam locomotives in regular use, but although withdrawn in 1971, they were last steamed in 1970.}} London Transport commemorated the end of operating steam locomotives with a special run from Moorgate station to Neasden depot. The train comprised No. L94 (No. 7752) and a selection of maintenance rolling stock.{{sfn|Scott-Morgan|Martin|2008|p=145}}
Three [[London Underground diesel locomotives#DL81-DL83|diesel-hydraulic locomotives]] were bought to carry out the shunting duties from then on.{{sfn|Casserley|1979|p=95}}

{|class = "wikitable sortable" summary = "A six column table with thirteen rows in ascending order of London Transport number, BR number, date built, date to London Transport, withdrawal date, and notes"
|+ London Transport 5700s{{sfn|Casserley|1979|p=95}}
|-
!LT Number
!BR No.
!Date Built
!Date to LT
!Withdrawn by LT
!Notes
|-
|L89
|5775
|1929
|1963
|1969
|Sold to [[Keighley & Worth Valley Railway]]{{efn|Moved to the railway in January 1970 and within a few months was used in filming for [[The Railway Children]].{{sfn|Heavyside|1996|p=7}}}}
|-
|L90 (I)
|7711
|1930
|1956
|1961
|Scrapped
|-
|L90 (II)
|7760
|1930
|1961
|1971
|Sold to 7029 Clun Castle Ltd{{efn|name=Tyseley|
7029 Clun Castle Ltd., a registered educational charity, owns the Tyseley Collection (held at [[Tyseley Locomotive Works]]). [[Vintage Trains]], a charitable trust (previously known as Birmingham Railway Museum Trust), is the custodian of the Tyseley Collection.{{sfn|Vintage Trains}}}}
|-
|L91 (I)
|5752
|1929
|1956
|1960
|Scrapped
|-
|L91 (II)
|5757
|1929
|1960
|1968
|Scrapped
|-
|L92
|5786
|1930
|1958
|1969
|Sold to Worcester Locomotive Society{{efn|Now based at the [[South Devon Railway (heritage railway)|South Devon Railway]].{{sfn|Jones|2014|p=156}}}}
|-
|L93
|7779
|1930
|1958
|1968
|Scrapped
|-
|L94
|7752
|1930
|1959
|1971
|Sold to 7029 Clun Castle Ltd{{efn|name=Tyseley}}
|-
|L95
|5764
|1929
|1960
|1971
|Sold to [[Severn Valley Railway]]{{efn|name=SVR Pannier Tank Fund|Three 5700s were bought by the SVR Pannier Tank Fund: No. 5764,{{sfn|Ferris|1995|p=23}} No. 7714,{{sfn|Ferris|1995|p=29}} and No. 3612{{sfn|Jones|2014|p=140}} which was bought for spares and not restored.}}
|-
|L96
|7741
|1930
|1961
|1967
|Scrapped
|-
|L97
|7749
|1930
|1962
|1970
|Scrapped
|-
|L98
|7739
|1929
|1962
|1970
|Scrapped
|-
|L99
|7715
|1930
|1963
|1969
|Sold to Quainton Railway Society{{efn|The Quainton Railway Society now operates as the [[Buckinghamshire Railway Centre]].}}
|}

=== National Coal Board ===
[[File:Brithdir ex-GW '5700' 0-6-0PT working for the National Coal Board geograph-2571899-by-Ben-Brooksbank.jpg|thumb|right|alt=A pannier tank locomotive, seen from above and to the front, is passing through hilly countryside. The locomotive, particularly at the front, is streaked with vertical stains. The lettering "NCB 7754" is shown on the side of the pannier tank.|No. 7754 working for the NCB in 1965]]
Between 1959 and 1965, the National Coal Board (NCB) bought five 5700s from BR for use at pits in South Wales, continuing a tradition of the GWR selling withdrawn pannier tank locomotives to the NCB.{{sfn|Whitehurst|1973|p=82}} The engines retained their BR numbers. The NCB locomotives did not receive maintenance to match GWR standards and were run into the ground, saving the cost of expensive overhauls.{{sfn|Jones|2014|p=74}}

One of the NCB 5700s, No. 7754, was the last in industrial service, and after working at various collieries was moved to [[Deep Duffryn Colliery]] at [[Mountain Ash, Rhondda Cynon Taf|Mountain Ash]] in 1970, where an ex-GWR fitter kept it working until 1975 when a loose piston resulted in a blown cylinder cover. No. 7754 could still be seen on shed in 1980.{{sfn|Jones|2014|p=170}} The NCB donated No. 7754 to the [[National Museum Wales]], who placed it on permanent loan to the [[Llangollen Railway]]. It is now owned by the Llangollen Railway Trust.{{sfn|Jones|2014|p=170}}

{|class="wikitable sortable" summary = "Details of NCB 5700s in a table of five and five rows in ascending order of BR number."
|+ NCB 5700s
|-

!BR No.
!Date Built
!Date to NCB
!Location
!Notes
|-
|3663
|1940
|1962
|Nine Mile Point
|Scrapped 1966{{sfn|Jones|2014|p=76}}
|-
|7714
|1930
|1959
|Penallta
|Sold to [[Severn Valley Railway]]{{efn|name=SVR Pannier Tank Fund}}
|-
|7754
|1930
|1959
|Mountain Ash
|Donated by NCB to the [[National Museum Wales]]
|-
|9600
|1945
|1965
|Merthyr Vale
|Sold to 7029 Clun Castle Ltd{{efn|name=Tyseley}}
|-
|9792
|1936
|1964
|Maerdy
|Scrapped 1973{{sfn|Jones|2014|p=76}}
|}

=== Other uses ===
[[File:GWR Collett 57XX Class 9642 (8220977889).jpg|thumb|right|alt=A pannier tank locomotive stands alone in a scrapyard next to a semi-derelict building. In the background are other locomotives waiting to be scrapped. To the left is a fence of concrete posts with wire.|No. 9642 at Hayes scrapyard in 1965]]
No. 3650 was withdrawn in 1963 and then sold to P.D. Fuels, a division of [[Stephenson Clarke|Stephenson Clarke Ltd.]], and was used to move spoil to slag heaps at Gwaun-Cae-Gurwen colliery near [[Ammanford]], [[Carmarthenshire]].{{sfn|Jones|2014|p=140}} It was later bought and restored by members of the [[Great Western Society]] and became operational in 2009.

No. 9642 was withdrawn in 1964 and sent to Hayes Scrapyard, near Bridgend. Rather than being scrapped, it was used to shunt other locomotives being scrapped. It was due for disposal in 1967, making it the 346th locomotive to be scrapped there, but due to a last minute intervention<ref>{{cite web |title=Scrapyard Name: R.S. Hayes/Birds, Tremains Yard, Bridgend |url=https://www.railuk.info/steam/getscrap.php?id=61 |website=Rail UK |access-date=4 December 2020}}</ref> the locomotive was bought in 1968 and restored by the South Wales Pannier Group, becoming the first member of the class to be preserved.{{sfn|Jones|2014|p=180}} It was moved to Maesteg Colliery, where it gave brake van rides from the late 1960s and throughout the 1970s.<ref>{{cite web |title=9642 |url=https://preservedbritishsteamlocomotives.com/9642-2/ |website=Preserved British Steam Locomotives |date=17 June 2017 |publisher=WordPress.com |access-date=4 December 2020}}</ref><ref>{{cite book |last1=Derrick |first1=Kevin |title=Sixties Spotting Days Around London & The Home Counties |date=15 December 2016 |publisher=Amberley Publishing |location=Stroud, Gloucestershire |isbn=9781445660646 |url=https://books.google.com/books?id=A566DQAAQBAJ |access-date=4 December 2020}}</ref>

== Preservation ==

Sixteen 5700 class locomotives have been preserved of which one half are from the original 5700 Class and the other half are members of the 8750 sub-class. 11 are Swindon built classmembers with the remaining five being from outside contractors. Of the sixteen engines, five are currently operational. Four of the class have worked mainline trains: 7715, 7752, 7760 and 9600. As of 2020, none of the engines are mainline certified: 7715, 7752, 7760 and 9600 are stored out of service awaiting overhauls. Two locomotives are on static display, and two are in store. Six locomotives are undergoing, or waiting for, maintenance. One locomotive, No. 9629, is being restored, and has not been in steam since it was sent to [[Woodham Brothers|Barry Scrapyard]] in 1965.

A number of those bought from London Transport, which had been maintained by British Railways, were still in running order and were used on heritage railways with minimal work. No. 5764 (LT L95) was steamed the day it arrived at Bridgnorth on the [[Severn Valley Railway]], being lit-up before it had been removed from the low-loader on which it was delivered.{{sfn|Jones|2014|p=151}} As of June 2018, Nos. 7752 (LT L94) and 5786 (LT L92) can be seen running in the maroon livery of London Transport, but No. 7715 (LT L99) is currently out of service.{{sfn|Vintage Trains 7752}}{{sfn|South Devon Railway}}{{sfn|Buckinghamshire Railway}}

The locomotives that were preserved after NCB and industrial use required rather more work than those acquired from London Transport. Some had been laid up for sometime after being withdrawn, and had received very little, if any, maintenance.{{sfn|Jones|2014|p=142}}

Of the twelve 5700s that went to Barry Scrapyard, five were saved for preservation and one (No. 3612) was bought for spares by the Severn Valley Railway.{{sfn|Jones|2014|p=139}}

{|class="wikitable sortable" summary="A table with five columns showing the sixteen preserved 5700s. The images in the second column all have alt text."
|+5700s in Preservation
<!--*** New Row *************************************************************-->
|- valign="top"
! style="width:8%;"| No.
! class=unsortable | Photo
! class=unsortable | Notes
! style="width:5%;"| Year Built
! style="width:8%;"| Location Built
! style="width:18%;"| Operated/owned by
<!--*** New Row *************************************************************-->
|- valign="top"
|3650 (8750)
|[[File:Hugh llewelyn 3650 (6825277981).jpg|
alt=A green pannier tank locomotive, viewed from the left and front, is standing in front of two other locomotives. The locomotive is fitted with a chimney, rounded boiler dome, and a curved safety valve cover. The cab is enclosed with rectangular windows. Although mainly green, the chimney, front, and undercarriage are painted black, except the coupling rods which are grey, and the front buffer beam is painted red. On the side of the pannier tank is a yellow roundel with the letters G W R. On the side of the cab there is a small blue disc and a black number plate with the letters and edging in yellow.|150px]]
|No. 3650 was withdrawn in 1963 and bought by Stephenson Clarke to work in a South Wales colliery. It was later bought by a [[Great Western Society]] (GWS) member{{efn|No. 3650 is now owned by a group of GWS members, and was restored by a group of volunteers known as The Black Cupboard Gang.{{sfn|Great Western Society 3650}}}} and moved to Hereford. It was then moved to [[Didcot Railway Centre]] around 1970 for full restoration and was restored to service in 2008.{{sfn|Jones|2014|pp=140–144}} It was withdrawn in 2016 for overhaul which is in progress.<ref>[https://didcotrailwaycentre.org.uk/article.php/64/3650-57xx-class 3650 - 57XX Class] Didcot Railway Centre</ref>
|1939
|[[Swindon Works]]
|[[Didcot Railway Centre]]
<!--*** New Row *************************************************************-->
|- valign="top"
|3738 (8750)
|[[File:GWR 5700 Class 3738 Didcot Railway Centre (1).jpg|
alt=A black pannier tank locomotive, with the letters GWR in yellow on the side, pulls a mixed traffic train. The train includes a blue tank wagon, with "Express Dairy Milk for London" written on the side, and then a passenger carriage painted cream and red.|150px]]
|No. 3738 was withdrawn in 1965 and sent to [[Woodham Brothers|Barry Scrapyard]]. It was bought by two GWS members and taken to [[Didcot Railway Centre]] in 1974, and restored to full use in 1975.{{sfn|Great Western Society 3738}} After overhauls it last returned to service in 2007.{{sfn|Jones|2014|pp=144–145}} It was taken out of service in 2013 because of firebox problems and is on static display.{{sfn|Great Western Society 3738}}
|1937
|[[Swindon Works]]
|Didcot Railway Centre
<!--*** New Row *************************************************************-->
|- valign="top"
|4612 (8750)
|[[File:4612 in Ropley station.jpg|
alt=A green pannier tank locomotive blowing off steam as it moves backwards. |150px]]
|No. 4612 was withdrawn in 1965, sent to Barry scrapyard, and later bought by the [[Keighley & Worth Valley Railway]] (KWVR) in 1981 for spares.{{sfn|Jones|2014|p=150}} It was then bought privately in 1987 and was restored by the Swindon Railway Workshop.{{efn|Not to be confused with the [[Swindon Works]]. The Swindon Railway Workshop occupied part of the then closed Swindon Works. The business later moved to Lydney, Gloucester, and is now known as The Flour Mill.}} After restoration was completed in 2001, No. 4612 was moved to the [[Bodmin and Wenford Railway]] which now owns the locomotive, and returned to service in 2013 following a ten-year overhaul.{{sfn|Bodmin and Wenford}}
|1942
|[[Swindon Works]]
|[[Bodmin and Wenford Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|5764/L95 (5700)
|[[File:5764 Highley Engine House.jpg|
alt=A red pannier tank locomotive, viewed from the front on display inside a railway museum, surrounded by other locomotives.|150px]]
|No. 5764 was sold to London Transport (LT) in 1960 and renumbered L95. It was sold to the [[Severn Valley Railway]]{{efn|name=SVR Pannier Tank Fund}} in 1971, and was operational less than a month after last being used on LT.{{sfn|Jones|2014|p=151}} It was last used on New Year's Eve 2010,{{sfn|Jones|2014|p=152}} and {{As of|2024|05|lc=y}} is on display in [[The Engine House]] in LT livery.{{sfn|Severn Valley}}
|1929
|[[Swindon Works]]
|[[Severn Valley Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|5775/L89 (5700)
|[[File:GWR 0-6-0PT Pannier Tank (5775).jpg|150px]]
|No. 5775 was sold to LT in 1958 and renumbered L89. It was sold to the KWVR in 1970 and soon appeared in the film [[The Railway Children (1970 film)|''The Railway Children'']] in the brown livery of the fictional Great North & South Railway (GN&SR).{{sfn|Jones|2014|p=153}} No. 5775 went to [[National Railway Museum Shildon|Locomotion, the National Railway Museum at Shildon]] in May 2014 to be repainted in the livery used in the film for an exhibition, and returned to the KWVR in time for a celebration of the making of the film in May 2015.{{sfn|Heritage Railway|p=11}}{{sfn|KWVR 5775}}{{sfn|KWVR Railway Children Weekend}} Currently, the loco is on display in the exhibition shed at Oxenhope station pending a further overhaul.
|1929
|[[Swindon Works]]
|[[Keighley and Worth Valley Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|5786/L92 (5700)
|[[File:L92 (16903764102).jpg|alt=A black pannier tank locomotive is travelling from right to left, bunker first, along a single track on the side of a wooded hill. The locomotive is pulling five passenger carriages painted cream and brown, and a plume of smoke is passing over the first two carriages. The image of the train is reflected the river in front of the train.|frameless|150x150px]]
|No. 5786 was sold to LT in 1958 and renumbered L92. It was sold to the Worcester Locomotive Society in 1969 and was based at Bulmers Railway Centre until 1993.{{sfn|Jones|2014|pp=155–6}} Since then it has been on loan to the [[South Devon Railway (heritage railway)|South Devon Railway]]. It returned to service in 2013 in the maroon livery of LT.{{sfn|South Devon Railway}} 5786's boiler ticket expired on 31 May 2023, it is currently undergoing a 10-year overhaul.<ref>{{cite web | url=https://www.southdevonrailwayassociation.org/News-and-Press-Releases/Loco-Roster-May-2k23.html | title=South Devon Railway - May 2023 Locomotive Roster }}</ref>
|1930
|[[Swindon Works]]
|[[South Devon Railway (heritage railway)|South Devon Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|7714 (5700)
|[[File:GWR 5700 Class 7714 Severn Valley Railway Spring Steam Gala 2023.jpg|
alt=A green pannier tank locomotive is seen from above and to the front as it waits at a station with two railway tracks and platform. The platform on the left includes a small wooden shelter, benches, lamps, flowers, and, near the end of the platform, three milk churns positioning across the platform to prevent people passing. The platform on the right, where the train is waiting, includes a brick building, more flowers, and again, three milk churns arranged to stop people passing. There is also a signal near the locomotive, and its black and white semaphore arm is pointing downward. The train includes seven coaches in maroon. A plume of grey smoke comes from the locomotive chimney, and a smaller plume of white steam from the safety valve near the cab. |150px]]
|No. 7714 was withdrawn in 1959 and sold to the National Coal Board (NCB). It was bought by SVR{{efn|name=SVR Pannier Tank Fund}} in 1973 and was first steamed in 1992 after an extensive overhaul.{{sfn|Jones|2014|p=167}} Withdrawn from service in 2009,{{sfn|Jones|2014|p=167}} the engine re-entered service after overhaul in late November 2016. It currently wears the BR Unlined Black livery. It is the only survivor of the class in preservation to retain a backhead feed boiler.
|1930
|[[Kerr Stuart]]
|Severn Valley Railway
<!--*** New Row *************************************************************-->
|- valign="top"
|7715/L99 (5700)
|[[File:London Transport L99 & City of Truro at Sheringham.jpg|
alt=A pannier tank locomotive is standing at a platform, leading a train which includes a second locomotive and one visible passenger carriage. The pannier tanker is maroon, apart from the black chimney and red coupling rods and buffer beam. The tank, cab, steps, splashers and toolbox are all lined in yellow. London Transport is written on the side of the tank, and L.99 on the side of the cab, again in yellow. The second, larger, locomotive is green with a brass safety valve cover, a name plate over one of the wheels, and has a tender behind it.|150px]]
|No. 7715 was sold to LT in 1959 and renumbered L99. It was bought by the London Railway Preservation Society in 1968 and was later certified for mainline operation on British Rail.{{sfn|Jones|2014|p=167}} No. 7715 has worked specials on LT and has been loaned to other heritage railways and operators, but was withdrawn from service because of a cracked boiler foundation ring. It returned to Quainton{{efn|Quainton is the headquarters and workshop of the Buckinghamshire Railway Centre.}} in May 2014 and is awaiting the necessary repairs to return it to service.{{sfn|Buckinghamshire Railway}}
|1930
|[[Kerr Stuart]]
|[[Buckinghamshire Railway Centre]]
<!--*** New Row *************************************************************-->
|- valign="top"
|7752/L94 (5700)
|[[File:Minehead - 7752 GWR livery.JPG|
alt=A pannier tank locomotive is passing a station platform, running round its train which includes rolling stock visible in the background. The pannier tanker is green, apart from the black chimney, brass safety valve cover,  red buffer beam, and grey coupling rods. Great Western is written on the side of the tank, and 7752 on a number plate on the cab|150px]]
|No. 7752 was sold to LT in 1959 and renumbered L94. In 1971 No. 7752 hauled the last steam train on the London Underground. It was immediately bought by 7029 Clun Castle Ltd., and is certified for mainline operation.{{sfn|Jones|2014|p=168}} It has visited various heritage railways and was outshopped in LT livery in 2011 to celebrate the fortieth anniversary of the last run on London Underground.,{{sfn|Vintage Trains 7752}} Locomotive is to be repainted back to GWR Green with 'GREAT WESTERN' lettering at Minehead during loan to the WSR for the 2019 season
|1930
|[[North British Locomotive Company|NBL Glasgow]]
|[[Vintage Trains]], [[Tyseley Locomotive Works|Tyseley]]{{efn|name=Tyseley}}
|- valign="top"
|7754 (5700)
|[[File:GWR 5700 Class 7754 at York Railfest.JPG|
alt=A pannier tank locomotive is seen from the front a slightly to the right. The cab and pannier tank are painted green. The chimney, smokebox, running plate, splashers, and wheels are black, and the buffer beam and coupling rods are red. The number, 7754, is shown in white letters on a black plate on the smokebox door. Part of round cab window is visible and is edged in brass. The white lettering "NCB 7754" is on the side of the pannier tank.|150px]]
|No. 7754 was withdrawn in 1959 and sold to [[National Coal Board]] (NCB) and worked at various collieries until 1975, becoming the last 5700 in "real", rather than "heritage", service.{{sfn|Jones|2014|pp=169–70}} The NCB were persuaded to donate the locomotive to [[National Museum Wales]] who loaned it to [[Llangollen Railway]], which now owns the locomotive. After a long and expensive overhaul, and the addition of parts from No. 3612 which was held for spares by the SVR, it moved under its own power in 1993.{{sfn|Llangollen Railway}} After many years in service No. 7754 is currently out of traffic undergoing overhaul.{{sfn|Jones|2014|p=171}}
Following completion of an extensive overhaul in Llangollen engine shed, 7754 returned to service in September 2023 wearing Transitional livery (Great Western Green with British Railways lettering in GWR Egyptian font).<ref>{{cite magazine |title=7754 emerged in Transitional livery first for Llangollen |magazine=Heritage Railway|issue=311 |date=October 2023 |page=23}}</ref>
|1930
|[[North British Locomotive Company|NBL Glasgow]]
|[[Llangollen Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|7760/L90 (5700)
|[[File:Hugh llewelyn 7760 (6619239561).jpg|
alt=Two pannier tank locomotives are seen from the front and to the right and are standing next to each other in front of a turntable. Both locomotives have black chimneys and fronts. The cabs, pannier tanks, clackbox covers and boiler domes are all green. The buffer beams are red and include the locomotive number in yellow with black edging, 7752 on the left locomotive and 7760 on the right. On the right locomotive, one round cab window is visible and is edged in brass.|150px]]
|No. 7760 was sold to LT in 1961, renumbered L90 (replacing No. 7711 which was scrapped), and then sold to 7029 Clun Castle Ltd in 1971 in full working order. It has been loaned to various heritage railways and was certified for mainline operation in 2000.{{sfn|Vintage Trains 7760}} As of January 2024 No. 7760 is out of service awaiting an overhaul.{{sfn|Jones|2014|p=172}}
[[Vintage Trains]] announced in January 2024 that as their intention was to focus primarily on sister engines 7752 and 9600 for operational use and future mainline running, 7760 alongside select additional steam engines which didn't fit in with their future development plans were to be sold to new owners.<ref name="7760 On sale as part of Tyseley's growth plans">{{Cite web |author= |date=23 January 2024 |title=Steam locomotive changes at Vintage Trains as growth plans announced |url=https://www.railadvent.co.uk/2024/01/steam-locomotive-changes-at-vintage-trains-as-growth-plans-announced.html |access-date=23 January 2024 |work=RailAdvent}}</ref> The locomotive has since been sold to a private buyer and left Tyseley.<ref>{{cite magazine |last1=Corbett |first1=Mike |last2=Hughes |first2=Michael |date=Spring 2024 |title=Workshop Report |magazine=Steam In Trust |issue=54 |location= Tyseley|publisher=Friends of Vintage Trains }}</ref>
|1930
|[[North British Locomotive Company|NBL Glasgow]]
|
<!--*** New Row *************************************************************-->
|- valign="top"
|9600 (8750)
|[[File:9600 Tyseley (2).jpg|
alt=A pannier tank locomotive is seen from the front and to the right and is standing over an ash pit. It is all in black apart from a number of small details. The buffer beam at the front is red. The locomotive number, 9600, is shown in white on a plate on the smokebox door and on a larger plate, edged in white, on the side of the cab. There is a small yellow disc, with the letter C above the number plate. The shed number, 84 E, is shown in white on a small plate near the bottom of the smokebox door. The pannier tank and cab side are lined in red and white, and the British Railways crest, in yellow, white and red, is on the side of the pannier. The letters T Y S are shown in white on the running plate step near the front. The coupling rods are unpainted and are steel grey. Finally, two white lamps are stored next to the black toolbox near the back of the running plate.|150px]]
|No. 9600 was withdrawn in 1965 and sold to NCB and was in service at [[Merthyr Vale]] colliery until 1973. It was then sold to 7029 Clun Castle Ltd and its overhaul was completed in 1997.{{sfn|Jones|2014|p=176}} No. 9600 was certified for mainline operation in 1999, re-certified in 2009, and has regularly worked excursion trains. Boiler ticket expired in 2018 and is awaiting overhaul.{{sfn|Vintage Trains 9600}}
|1945
|[[Swindon Works]]
|Vintage Trains, Tyseley{{efn|name=Tyseley}}
<!--*** New Row *************************************************************-->
|- valign="top"
|9629 (8750)
|[[File:Locomotive outside Toys R Us in Cardiff - geograph.org.uk - 1462848.jpg|
alt=A green pannier tank locomotive stands on a short length of track on a gravel bed surrounded by grass. In the background is a brick building. The letters G W R are shown on the side of the pannier tank. A small box stands near the cab and is pointing to the wheels.|150px]]
|No. 9629 was withdrawn in 1964 and sent to Barry scrapyard in 1965. In 1981 went to [[Steamtown (Carnforth)|Steamtown, Carnforth]] for a five-year cosmetic restoration before being on static display outside the Holiday Inn, Cardiff for nine years. The owners donated it to the Pontypool & Blaenavon Locomotive Group in 1995.{{sfn|P & B Loco Group}} No. 9629 is now undergoing restoration at [[Pontypool and Blaenavon Railway]], and its original boiler was acquired in 2012.{{sfn|Jones|2014|p=176}}
|1945
|[[Swindon Works]]
|[[Pontypool & Blaenavon Railway|Pontypool & Blaenavon Locomotive Group]]
<!--*** New Row *************************************************************-->
|- valign="top"
|9642 (8750)
|[[File:Waiting in the rain... (2086198303).jpg|
alt= A black pannier tank locomotive is waiting at a platform with a train of two cream and brown passenger carriages. In the background is a green wooded hill, and a small wooden station building with a slate roof. The station master is sheltering from the rain in the doorway of the building. Smoke and steam are coming from the locomotive as it prepares to move off.|150px]]
|No. 9642 was withdrawn in 1964 and sent to Hayes Scrapyard, but was used to shunt other locomotives, and was saved by the South Wales Pannier Group in 1968 and was steamed in 1969. It was later moved to the [[Swansea Vale Railway#Preservation|Swansea Valley Railway Society]], and then the [[Dean Forest Railway]] in 1994. In 2005 No. 9642 was bought privately for use on the [[Gloucestershire Warwickshire Railway]]. It was soon removed for overhaul and will return to operation when restoration is complete.{{sfn|Jones|2014|pp=181–183}}
|1946
|[[Swindon Works]]
|[[Gloucestershire Warwickshire Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|9681 (8750)
|[[File:9681 sits at Parkend.JPG|
alt=A black pannier tank locomotive is passing along a single track through woodland. The locomotive is pulling a train of a covered red wagon, three grey open wagons, and a red guard's van.|150px]]
| No. 9681 was withdrawn and sent to Barry scrapyard in 1965. It was taken to the [[Dean Forest Railway]] in 1975 and returned to steam in 1984.{{sfn|Jones|2014|p=183}} It was taken out of service in 2013 for overhaul, which is currently progressing at Norchard.{{sfn|Dean Forest Railway}}
|1949
|[[Swindon Works]]
|[[Dean Forest Railway]]
<!--*** New Row *************************************************************-->
|- valign="top"
|9682 (8750)
|[[File:9682 Chinnor A2.JPG|
alt=A black pannier tank locomotive is standing at the platform of a small rural railway station with a brick and slate building, cream wooden fencing, and lamp. The driver is standing next to the locomotive and is talking to a group of passengers who are about to board the red passenger carriage. |150px]]
|No. 9682 was withdrawn in 1965 and sent to Barry scrapyard. It was bought by the [[Southall Railway Centre|GWR Preservation Group]] in 1982 and, after overhaul, returned to traffic in 2000. It has since been loaned to various heritage railways, most recently the [[Chinnor and Princes Risborough Railway]]. It was taken out of service in 2009 and returned to [[Southall Railway Centre|Southall]] for overhaul.{{sfn|Jones|2014|pp=186–7}}
|1949
|[[Swindon Works]]
|[[Dean Forest Railway]]
|}
{{notelist-lr|close}}

== Liveries ==
The GWR 5700 class locomotives have been in a number of liveries throughout preservation and their working lives.
{| class="wikitable"
|+
!Livery
!Image
!Notes
|-
|GWR Shirtbutton
|[[File:Hugh llewelyn 3650 (6825277981).jpg|frameless]]
|
|-
|GWR
|[[File:Long Rock 2019 - 4612.JPG|frameless]]
|
|-
|Great Western
|[[File:GWR Class 5700 No 5764 Pannier (3000285676).jpg|frameless]]
|
|-
|GWR wartime black
|[[File:Hugh llewelyn 3738 (5594996797).jpg|frameless]]
|
|-
|BR unlined black (early crest)
|[[File:5786 at Littlehempston Station.jpg|frameless]]
|
|-
|BR unlined black (late crest)
|[[File:GWR 5700 Class 7714 Pannier Tank Locomotive Severn Valley Railway (1).jpg|frameless]]
|
|-
|BR lined black (early crest)
|[[File:9600 Tyseley (1).jpg|frameless]]
|
|-
|London Transport
|[[File:L92 1 (16282620804).jpg|frameless]]
|
|-
|Great North & South Railway
|[[File:GWR 0-6-0PT Pannier Tank (5775).jpg|frameless]]
|Repainted in a fictional livery for [[The Railway Children (1970 film)|''The Railway Children'']] 
|-
|National Coal Board
|[[File:GWR 5700 Class 7754 at York Railfest.JPG|frameless]]
|
|}

==In fiction==

No. 5775 on the [[Keighley and Worth Valley Railway]] featured in the film ''[[The Railway Children (1970 film)|The Railway Children]]'' painted brown and lettered with GN&SR (Great Northern and Southern Railway).{{sfn|Jones|2014|p=153–155}} In May 2014, No. 5775 was moved to [[National Railway Museum Shildon]], for cosmetic restoration back to the livery used in the film.{{sfn|Heritage Railway|p=11}}

The character Duck in ''[[The Railway Series]]'' books and the TV series ''[[Thomas & Friends|Thomas the Tank Engine and Friends]]'' is a class 5700 pannier tank. In the books, his number was 5741.{{sfn|Jones|2014|p=187–189}}<ref>{{cite book|title=The Island of Sodor - its People, History and Railways |author=Wilbert Vere Awdry |page=126}}</ref> The real 5741 was withdrawn on 30 June 1957 and scrapped on 31 May 1958.<ref>{{cite web | url=https://www.railuk.info/steam/getsteam.php?row_id=2674 | title=Rail UK British Railway Steam Locomotive }}</ref>

No. 5764 appeared several times in the 1976 BBC television adaptation of [[Charles Dickens]]' short ghost story, ''[[The Signal-Man]]''.{{sfn|Jones|2014|p=152}}

==Model railways==
[[Mainline Railways]] had [[OO gauge]] Class 5700 models in their catalogue in 1982–3, with models in GWR green and BR black.<ref name="Railmar83p36">{{cite magazine|title=Mainline's big plans for 1983|pages=36–7|magazine=[[RAIL (magazine)|Rail Enthusiast]]|publisher=EMAP National Publications|date=March 1983|issn=0262-561X|oclc=49957965}}</ref> [[Hornby Railways|Hornby]] produced various OO gauge models of the 8750 class in GWR and LT liveries.{{sfn|Faulkner}}

[[Dapol]] since their merger with Lionheart Models in August 2016 <ref>{{cite web |url=https://dapol.co.uk/index.php?route=blog%2Fpost&post_id=10 |title=Lionheart & Dapol |access-date=31 March 2022 |archive-date=11 April 2019 |archive-url=https://web.archive.org/web/20190411194509/https://www.dapol.co.uk/index.php?route=blog%2Fpost&post_id=10 |url-status=dead }}</ref> has produced several versions of the 57xx class and 87xx subclass in O gauge since 2018.<ref>{{cite web|url=http://www.tower-models.com/towermodels/ogauge/dapol/dapolloco/57xx/index.htm|title = O gauge dapol locomotives}}</ref> Minerva models has also released 0 gauge models of the 57xx in Great Western and British railway liveries.<ref>{{Cite web |url=https://www.hornbymagazine.com/2016/09/07/minerva-reveals-second-57xx-for-o/ |title=Minerva reveals second '57XX' for 'O' &#124; Hornby Magazine |access-date=3 November 2017 |archive-date=7 November 2017 |archive-url=https://web.archive.org/web/20171107012712/http://www.hornbymagazine.com/2016/09/07/minerva-reveals-second-57xx-for-o/ |url-status=dead }}</ref>

== See also ==
* [[GWR 0-6-0PT]] – ''list of classes of GWR 0-6-0 pannier tank, including table of preserved locomotives''
* [[LMS Fowler Class 3F]] – the [[London, Midland and Scottish Railway|London, Midland and Scottish Railway's]] standard shunter
* [[LNER Class J50]] – the [[London and North Eastern Railway|London and North Eastern Railway's]] standard shunter
* [[Hunslet Austerity 0-6-0ST]] – the [[War Department (United Kingdom)|War Department's]] standard shunter
* [[British Rail Class 08]] – BR's standard shunter in the 1950s and 1960s

== Notes ==

{{notelist}}

== References ==
{{reflist|colwidth=20em}}
*{{cite web
|title      = 3650
|url        = https://www.didcotrailwaycentre.org.uk/locos/3650/3650.html
|archive-url = https://web.archive.org/web/20131011083047/http://www.didcotrailwaycentre.org.uk/locos/3650/3650.html
|archive-date=11 October 2013
|website    = Didcot Railway Centre – Home of the Great Western Society
|access-date = 1 July 2014
|date       = 19 May 2012
|ref        = {{sfnref|Great Western Society 3650}}
}}
*{{cite web
|title      = 3738
|url        = https://www.didcotrailwaycentre.org.uk/locos/3738/3738.html
|archive-url = https://web.archive.org/web/20130926004628/http://www.didcotrailwaycentre.org.uk/locos/3738/3738.html
|archive-date= 26 September 2013
|website    = Didcot Railway Centre – Home of the Great Western Society
|access-date = 1 July 2014
|date       = 10 August 2013
|ref        = {{sfnref|Great Western Society 3738}}
}}
*{{cite web
|title      = 4612 – Steam Locomotive 
|url        = https://www.bodminrailway.co.uk/stock/moreinfo/2
|archive-url = https://web.archive.org/web/20150212125655/http://www.bodminrailway.co.uk/stock/moreinfo/2
|archive-date= 12 February 2015
|website    = Bodmin and Wenford Railway
|access-date = 21 September 2014
|ref        = {{sfnref|Bodmin and Wenford}}
}}
*{{cite web
 |url         = https://dapol.co.uk/index.php?route=product/category&path=177_59_63_348
 |archive-url  = https://web.archive.org/web/20150212125827/http://dapol.co.uk/index.php?route=product%2Fcategory&path=177_59_63_348
 |archive-date = 12 February 2015
 |title       = 5700 Pannier Tank
 |website     = Dapol Model Railway Company
 |access-date  = 23 June 2014
 |ref         = {{sfnref|Dapol}}
 |url-status     = dead
}}
*{{cite web
|title      = 7754 
|url        = http://www.llangollen-railway.org.uk/sloco7754.html
|archive-url = https://web.archive.org/web/20140619173217/http://llangollen-railway.org.uk/sloco7754.html
|archive-date= 19 June 2014
|website    = Llangollen Railway Enthusiast and Archive Website 2014
|access-date = 23 September 2014
|ref        = {{sfnref|Llangollen Railway}}
}}
*{{cite web
| url        = https://pablg.pontypool-and-blaenavon.co.uk/page.aspx?page=9629%20History
|archive-url  = https://web.archive.org/web/20140714191145/http://pablg.pontypool-and-blaenavon.co.uk/page.aspx?page=9629%20History
|archive-date = 14 July 2014
| title      = 9629's History
| website    = The Pontypool & Blaenavon Locomotive Group
| access-date = 23 September 2014
| ref        = {{sfnref|P & B Loco Group}}
}}
*{{cite web
| url        = https://www.deanforestrailway.co.uk/section.php?xSec=38
|archive-url  = https://web.archive.org/web/20140531065355/http://www.deanforestrailway.co.uk/section.php?xSec=38
|archive-date = 31 May 2014
| title      = 9681 – Pannier Tank Engine
| website    = Dean Forest Railway
| access-date = 23 September 2014
| ref        = {{sfnref|Dean Forest Railway}}
}}
* {{cite book
| title     = The Golden Age of Steam Locomotive Building
| last      = Atkins
| first     = Philip
| year      = 1999
| publisher = Atlantic Transport Publishers and the [[National Railway Museum]]
| edition   = 1
| place     = Penryn, Cornwall
| isbn      = 0-906899-87-7
| oclc      = 468585665}}
*{{cite book 
| title      = The Great Western at War 1939–1945 
| first      = Tim 
| last       = Bryan 
| publisher  = Patrick Stephens
| place      = Yeovil, Somerset, UK
| date       = 1995
| edition    = 1
| isbn       = 1-85260-479-4
| oclc       = 60238810
}}
*{{cite book 
| title      = The last years of Metropolitan Steam 
| first      = H. C. 
| last       = Casserley 
| author-link = H. C. Casserley
| publisher  = D. Bradford Barton
| place      = Truro, UK
| date       = 1979
| edition    = 1
| isbn       = 0-85153-327-2
| oclc       = 810550677
}}
*{{cite book 
| last      = Chacksfield 
| first     = John
| title     = C.B Collett A Competent Successor 
| date      = 2002 
| edition   = 1 
| isbn      = 0-85361-586-1
| publisher = The Oakwood Press 
| location  = Usk, UK 
| oclc      = 51740457
}}
*{{cite book |last=Earnshaw |first=Alan |title=Trains in Trouble: Vol. 8 |year=1993 |publisher=Atlantic Books |location=Penryn |isbn=0-906899-52-4 }}
*{{cite web
|last       = Dare
|first      = Kevin
|title      = 3650's History
|url        = https://myweb.tiscali.co.uk/kevin.dare/main.html
|website    = 3650
|archive-url = https://web.archive.org/web/20130625055517/http://myweb.tiscali.co.uk/kevin.dare/main.html
|archive-date= 25 June 2013
|access-date = 14 February 2015
|date       = 2011
}}
*{{cite web
|last       = Elliott
|first      = Russ
|title      = GWR 1906–1934 Loco Livery
|url        = http://www.gwr.org.uk/liveriesloco1906.html
|website    = GWR Modelling
|archive-url = https://web.archive.org/web/20141006083924/http://www.gwr.org.uk/liveriesloco1906.html
|archive-date= 6 October 2014
|access-date = 14 February 2015
|date       = 2012a
}}
*{{cite web
|last       = Elliott
|first      = Russ
|title      = GWR 1934–1942 Loco Livery
|url        = http://www.gwr.org.uk/liveriesloco1934.html
|website    = GWR Modelling
|archive-url = https://web.archive.org/web/20141006091005/http://www.gwr.org.uk/liveriesloco1934.html
|archive-date= 6 October 2014
|access-date = 14 February 2015
|date       = 2012b
}}
*{{cite web
|last       = Elliott
|first      = Russ
|title      = GWR 1906–1934 Loco Livery
|url        = http://www.gwr.org.uk/liveriesloco1942.html
|website    = GWR Modelling
|archive-url = https://web.archive.org/web/20141006072208/http://www.gwr.org.uk/liveriesloco1942.html
|archive-date= 6 October 2014
|access-date = 14 February 2015
|date       = 2012c
}}
*{{cite web
|last       = Elliott
|first      = Russ
|title      = BR(W) Steam Loco Livery 1948–64
|url        = http://www.gwr.org.uk/liveriesloco1948.html
|website    = GWR Modelling
|archive-url = https://web.archive.org/web/20141006083152/http://www.gwr.org.uk/liveriesloco1948.html
|archive-date= 6 October 2014
|access-date = 14 February 2015
|date       = 2012d
}}
*{{cite web
|title      = Exceptional Naval and Polar Awards
|url        = https://www.dnw.co.uk/auction-archive/special-collections/lot.php?specialcollection_id=108&lot_id=60284
|website    = Dix Noonan Webb
|archive-url = https://web.archive.org/web/20150214113404/http://www.dnw.co.uk/auction-archive/special-collections/lot.php?specialcollection_id=108&lot_id=60284
|archive-date= 14 February 2015
|access-date = 14 February 2015
|date       = December 2007
|ref        = {{sfnref|Dix Noonan Webb}}
}}
*{{cite web
| url        = http://www.hornbyguide.com/class_details.asp?classid=9
| title      = Class 57XX
| last       = Faulkner
| first      = John
| website    = Hornby Railways Collector Guide
|archive-url  = https://web.archive.org/web/20111013140751/http://www.hornbyguide.com/class_details.asp?classid=9
|archive-date = 13 October 2011
|access-date  = 14 February 2015
}}
*{{cite book 
| title     = Severn Valley Locomotives as they were 
| first     = Tom 
| last      = Ferris
| year      = 1995
| publisher = Midland Publishing
| location  = Leicester, England
| isbn      = 1-85780-030-3
| oclc      = 33405136
}}
*{{cite book 
| title     = Great Western Railway Locomotive Design – a Critical Appreciation
| last      = Gibson
| first     = John
| publisher = [[David & Charles]]
| place     = Newton Abbott, UK
| date      = 1984
| edition   = 1
| isbn      = 0-7153-8606-9
| oclc      = 12666432
}}
*{{cite web
| title       = GWR 0-6-0PT Pannier Tank No. 5775
| url         = https://kwvr.co.uk/steam-train/great-western-railway-0-6-0pt-pannier-tank-no-5775/
| website     = Keighley & Worth Valley Railway
| access-date  = 19 February 2015
| archive-url  = https://web.archive.org/web/20150217175658/http://kwvr.co.uk/steam-train/great-western-railway-0-6-0pt-pannier-tank-no-5775/
| archive-date = 17 February 2015
|ref        = {{sfnref|KWVR 5775}}
}}
*{{cite web
|title      = GWR 0-6-0PT 5786 (L.92)
|url        = https://www.southdevonrailway.co.uk/locomotives/5786
|website    = South Devon Railway
|archive-url = https://web.archive.org/web/20141215004844/http://www.southdevonrailway.co.uk/locomotives/5786
|archive-date= 15 December 2014
|access-date = 14 February 2015
|ref        = {{sfnref|South Devon Railway}}
}}
*{{cite web
|title      = GWR 57XX Class 0-6-0PT No. 7715 (L.99)
|url        = https://www.brc-stockbook.co.uk/GWR7715.htm
|website    = Buckinghamshire Railway Centre
|archive-url = https://web.archive.org/web/20140704001046/http://www.brc-stockbook.co.uk/GWR7715.htm
|archive-date= 4 July 2014
|access-date = 14 February 2015
|ref        = {{sfnref|Buckinghamshire Railway}}
}}
*{{cite web
|title      = GWR Pannier 7752 (LT No. L94)
|url        = https://www.tyseleylocoworks.co.uk/tlw/7752.htm
|website    = Vintage Trains
|archive-url = https://web.archive.org/web/20141229025421/http://www.tyseleylocoworks.co.uk/tlw/7752.htm
|archive-date= 29 December 2014
|access-date = 14 February 2015
|ref        = {{sfnref|Vintage Trains 7752}}
}}
*{{cite web
|title      = GWR Pannier 7760
|url        = https://www.tyseleylocoworks.co.uk/tlw/7760.htm
|website    = Vintage Trains
|archive-url = https://web.archive.org/web/20141229023837/http://www.tyseleylocoworks.co.uk/tlw/7760.htm
|archive-date= 29 December 2014
|access-date = 14 February 2015
|ref        = {{sfnref|Vintage Trains 7760}}
}}
*{{cite web
|title      = GWR Pannier 9600
|url        = https://www.tyseleylocoworks.co.uk/tlw/9600.htm
|website    = Vintage Trains
|archive-url = https://web.archive.org/web/20141229025138/http://www.tyseleylocoworks.co.uk/tlw/9600.htm
|archive-date= 29 December 2014
|access-date = 14 February 2015
|ref        = {{sfnref|Vintage Trains 9600}}
}}
*{{cite web
| url        = https://eorailway.co.uk/departments/rolling-stock/steam-locomotives/
| title      = GWR Hall 4900 Class, Pitchford Hall No. 4953
| website    = Epping Ongar Railway
|archive-url  = https://web.archive.org/web/20141109193240/http://eorailway.co.uk/departments/rolling-stock/steam-locomotives/
|archive-date = 9 November 2014
|access-date  = 14 February 2015
| ref        = {{sfnref|Epping Ongar}}
}}
*{{cite web
| url        = https://www.justliketherealthing.co.uk/gwr-57008750-pannier-tank-o-gauge-model-loco-kit-p-111.html
| title      = GWR 5700/8750 Pannier tank O Gauge Model Loco kit
| website    = Just Like The Real Thing
|archive-url  = https://web.archive.org/web/20130412114931/http://www.justliketherealthing.co.uk/gwr-57008750-pannier-tank-o-gauge-model-loco-kit-p-111.html
|archive-date = 12 April 2013
|access-date  = 14 February 2015
| ref        = {{sfnref|JLTRT}}
}}
*{{cite book |title=Locomotives Illustrated no. 39 GWR pannier tanks post 1923 |first=Michael |last=Harris }}
*{{cite book 
| title     = Keighley & Worth Valley Locomotives as they were 
| first     = Tom 
| last      = Heavyside 
| publisher = Midland Publishing
| place     = Leicester, UK
| year      = 1996 
| isbn      = 1-85780-050-8
}}
*{{cite book 
| title     = Classic British Steam Locomotives 
| first     = Peter
| last      = Herring
| publisher = Abbeydale Press
| edition   = 1
| place     = Leicester, UK
| year      = 2000 
| isbn      = 1-86147-057-6
| oclc      = 44485041
}}
*{{cite book 
| last       = Holcroft 
| first      = Harold 
| author-link = Harold Holcroft 
| title      = An Outline of Great Western Locomotive Practice 1837–1947 
| date       = 1957 
| edition    = 1
| publisher  = [[Locomotive Publishing Company]] 
| location   = London
| oclc       = 13299691
}}
*{{cite book 
| title     = Great Western Railway Pannier Tanks
| last      = Jones
| first     = Robin
| publisher = The Crowood Press
| place     = Marlborough, UK
| date      = 2014
| edition   = 1
| isbn      = 978-1-84797-653-6
| oclc      = 859298680
}}
*{{RCTS-LocosGWR-5}}
*{{cite magazine
| title           = Livery 'comeback' for The Railway Children Pannier
| magazine        = Heritage Railway
| issue           = 190
| author          = <!--Staff writer(s); no by-line.-->
| publication-date = 5 June 2014
| publisher       = Mortons Media
| location        = Horncastle, Lincs, UK
| ref             = {{sfnref|Heritage Railway}}
}}
*{{wikicite
|reference  = {{London Gazette
|issue      = 35053
|page=484
|date       = 11 February 1941 
|supp=y
}}
|ref        = {{sfnref|London Gazette (1941)}}
}}
*{{cite web
|title      = Meet the Locomotives – Non-operational steam locomotives in storage or in course of restoration
|url        = http://www.svr.co.uk/MeetTheLoco.aspx?id=23
|website    = Severn Valley Railway
|archive-url = https://web.archive.org/web/20170702214909/http://svr.co.uk/MeetTheLoco.aspx?id=23
|archive-date= 2 July 2017
|access-date = 13 August 2017
|ref        = {{sfnref|Severn Valley}}
}}
*{{cite book 
| last       = Nock
| first      = O.S. 
| author-link = O.S. Nock
| title      = The Great Western Railway in the 20th Century 
| date       = 1972 
| edition    = 2
| publisher  = [[Ian Allan Publishing|Ian Allan]] 
| location   = London
| isbn       = 9780711002272
| oclc       = 251662074
}}
*{{cite web
|last1      = Officer
|first1     = Lawrence H.
|last2      = Williamson
|first2     = Samuel H.
|title      = Explaining the Measures of Worth
|url        = https://www.measuringworth.com/explaining_measures_of_worth.php
|website    = MeasuringWorth
|access-date = 22 August 2014
|date       = 2012
}}
*{{cite web
|last1      = Officer
|first1     = Lawrence H.
|last2      = Williamson
|first2     = Samuel H.
|title      = Five Ways to Compute the Relative Value of a UK Pound Amount, 1270 to Present
|url        = https://www.measuringworth.com/ukcompare
|website    = MeasuringWorth
|access-date = 22 August 2014
|date       = 2014
}}
*{{cite web
|title      = The Pontypool & Blaenavon Locomotive Group – 9629's History
|url        = https://pablg.pontypool-and-blaenavon.co.uk/page.aspx?page=9629%20History
|archive-url = https://web.archive.org/web/20140714191145/http://pablg.pontypool-and-blaenavon.co.uk/page.aspx?page=9629%20History
|archive-date= 14 July 2014
|access-date = 14 February 2015
|date       = 31 August 2012
|ref        = {{sfnref|P & B Loco Group – 9629's History}}
}}
*{{cite web
|title      = The Railway Children Weekend
|url        = https://kwvr.co.uk/event/the-raailway-children-weekend/
| website   = Keighley & Worth Valley Railway
|access-date = 19 February 2015
|archive-url = https://web.archive.org/web/20150217175807/http://kwvr.co.uk/event/the-raailway-children-weekend/
|archive-date=17 February 2015
|ref        = {{sfnref|KWVR Railway Children Weekend}}
}}
*{{cite book |title=A pictorial Record of Great Western Engines |first=J. H. |last=Russell |year=1975 }}
*{{cite book 
| last1     = Scott-Morgan
| first1    = John
| last2     = Martin
| first2    = Kirk
| title     = Red Panniers: Last Steam on the Underground
| publisher = Lightmoor Press
| location  = Lydney, Gloucester
| date      = 2008
| isbn      = 9781899889297 
| oclc      = 271770628
}}
*{{cite book 
| last      = Semmens 
| first     = Peter
| title     = History of the Great Western Railway 1. Consolidation, 1923–29
| publisher = Allen & Unwin
| location  = London
| date      = 1985
| isbn      = 9780043851043
| oclc      = 59803211
}}
*{{cite web
| title      = Vintage Trains – About Us – The Trust
| url        = https://www.tyseleylocoworks.co.uk/vt_about.htm
|archive-url  = https://web.archive.org/web/20140729172525/http://www.tyseleylocoworks.co.uk/vt_about.htm
|archive-date = 29 July 2014
|access-date  = 14 February 2015
| date       = 2 July 2013
| ref        = {{sfnref|Vintage Trains}}
}}
*{{cite web
 |last1        = Whalley
 |first1       = Tom
 |title        = Graham Farish by Bachmann Past and Present Models Rev. 11
 |url          = https://www.bachmann.co.uk/pdfs/farish_products_by_item_no_rev5.pdf
 |website      = World of Model Railways
 |publisher    = Bachmann Europe plc
 |access-date   = 23 June 2014
 |year         = 2013a
 |id           = GFPTW2013
 |archive-url  = https://web.archive.org/web/20150923181352/http://www.bachmann.co.uk/pdfs/farish_products_by_item_no_rev5.pdf
 |archive-date = 23 September 2015
 |url-status   = dead
}}
*{{cite web|last1=Whalley|first1=Tom|title=Bachmann Branchline Past and Present Models Rev. 5
|url=https://www.bachmann.co.uk/pdfs/branchline_products_by_item_no_rev11.pdf|website=World of Model Railways|publisher=Bachmann Europe plc
|access-date = 23 June 2014
|year=2013b |id=BLPTW2013 }}
*{{Whitehurst GW Engines from 1940}}

==Further reading==
*{{cite book
| title     = The Pannier Papers No.2 The 57XX Engines 36XX, 37XX, 46XX
| first1     = Ian
| last1      = Sixsmith
| first2    = Richard
| last2     = Derry
| publisher = The Irwell Press
| location  = Bedford, UK
| year      = 2011
| isbn      = 978-1-906919-33-7
| oclc      = 755069689
}}
*{{cite book
| title     = The Pannier Papers No.3 The 57XX Engines 57XX, 67XX, 77XX
| first1     = Ian
| last1      = Sixsmith
| first2    = Richard
| last2     = Derry
| publisher = The Irwell Press
| location  = Bedford, UK
| year      = 2011
| isbn      = 978-1-906919-44-3
| oclc      = 779581588
}}
*{{cite book
| title     = The Pannier Papers No.4 The 57XX Engines 87XX, 96XX, 97XX
| first1     = Ian
| last1      = Sixsmith
| first2    = Richard
| last2     = Derry
| publisher = The Irwell Press
| location  = Bedford, UK
| year      = 2012
| isbn      = 978-1-906919-48-1
| oclc      = 867995656
}}

== External links ==

{{commons category|GWR 5700 Class}}
* [http://www.greatwestern.org.uk/m_in_060_5700.htm 5700 Tank Class Introduction]
* [http://www.gwr.org.uk/nopanniers.html Guide to GWR Pannier Tank Classes]
* [https://www.youtube.com/watch?v=rGkCtlBnkZI Steam Locos in Profile – The GWR 5700 Pannier Tanks] – a 15-minute [[YouTube]] documentary
* [https://www.youtube.com/watch?v=u2awypOcWT0 No. 3650 in action at Didcot Railway] - includes footage taken in the cab and of the motion (7 minutes)

{{GWR Locomotives}}

{{#related:GWR 0-6-0PT}}
{{#related:GWR 9400 Class}}
{{#related:Locomotives of the Great Western Railway}}

[[Category:Great Western Railway locomotives|5700]]
[[Category:0-6-0PT locomotives]]
[[Category:Armstrong Whitworth locomotives]]
[[Category:Bagnall locomotives]]
[[Category:Beyer, Peacock locomotives]]
[[Category:Kerr Stuart locomotives]]
[[Category:NBL locomotives]]
[[Category:YEC locomotives]]
[[Category:Railway locomotives introduced in 1929]]
[[Category:Standard-gauge steam locomotives of Great Britain]]
[[Category:C n2t locomotives]]