Centre points of the United Kingdom
There has long been debate over the exact location of the geographical centre of the United Kingdom, and its constituent countries, due to the complexity and method of the calculation, such as whether to include offshore islands, and the fact that erosion will cause the position to change over time. There are two main methods of calculating this "centre": either as the centroid of the two-dimensional shape made by the country (projected to the Airy ellipsoid then flattened using the Transverse Mercator projection), or as the point farthest from the boundary of the country (either the sea, or, in the case of constituent countries, a land border). These two methods give quite different answers.
Traditional locations
The town of Haltwhistle in Northumberland has banners stating that it is the "Centre of Britain".[1] By another calculation the centre can also be said to be Dunsop Bridge, Lancashire, 71 miles (114 km) to the south.[2]
However, in 2002 the Ordnance Survey conducted studies that pinpointed the respective centres more precisely, and it is their results that are quoted below.[3]
Centroid locations
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Put simply, the centroid is the point at which a cardboard cut-out of the area could be perfectly balanced on the tip of a pencil.[4] Islands are assumed fixed to the mainland in their precise position by invisible rigid weightless wires. A mathematical method is used to do the balancing to a much greater accuracy than the practical method could achieve.
Unless stated, positions are the centroids of the two-dimensional shapes made by the countries. Calculations include offshore islands unless stated.
United Kingdom
- A position "in the middle of Morecambe Bay", approximately Script error: No such module "convert". off the coast at Morecambe (#2), Lancashire, at Ordnance Survey grid reference Script error: No such module "Ordnance Survey coordinates"..[5]
Great Britain
- Whitendale Hanging Stones (#1 on the map), near Brennand Farm, outside Dunsop Bridge, Lancashire in the Forest of Bowland.(Script error: No such module "Coordinates".; grid reference Script error: No such module "Ordnance Survey coordinates".) [2]
Great Britain (mainland only)
- A field south of Calderstones Partnership NHS Foundation Trust (#3), near Whalley, Lancashire (grid reference Script error: No such module "Ordnance Survey coordinates".)[6]
England
- Lindley Hall Farm (#4), Leicestershire (near Fenny Drayton and Higham on the Hill) (Script error: No such module "Coordinates".; Script error: No such module "Ordnance Survey coordinates".) [7] A plaque denoting this point, and disputing the "traditional" centre of England as being at Meriden in the West Midlands, was erected by Ordnance Survey on 14 June 2013 [8]
Northern Ireland
- Annaghone (#5), near Cookstown, County Tyrone (Script error: No such module "Coordinates". [9] grid reference Script error: No such module "Ordnance Survey coordinates". ) Irish grid ref H 84494 74047.
Scotland
- Between Blair Atholl (#6) and Dalwhinnie, Perthshire (Script error: No such module "Coordinates".; grid reference Script error: No such module "Ordnance Survey coordinates".) [4]
Wales
- Banc Mawr (#7), near Cwmystwyth, Ceredigion (Script error: No such module "Coordinates".; grid reference Script error: No such module "Ordnance Survey coordinates".)[10]
Locations found by other methods
Point farthest from the sea
- Church Flatts Farm (#8), Coton in the Elms, Derbyshire[2] (Script error: No such module "Coordinates".)
Point farthest from high tide mark (including tidal rivers)
- Between Hammerwich and Wall, south-west of Lichfield, Staffordshire (Script error: No such module "Coordinates".;)Script error: No such module "Unsubst".
Mid point of the longest north–south axis
- Haltwhistle, Northumberland. The midpoint of the longest north–south meridian; also approximately the midpoint of each of the lines through it across Great Britain along the 16 main compass directions.[11]
Centre of population
- This calculation depends on the method used (mean, median or geometric median; see Centre of population for details).
- A calculation by Danny Dorling using the mean (least squares) method based on local authority district data from the 1990s gave the population centre of Great Britain at Appleby Parva, Leicestershire, 20 miles south of Derby. Since then, the population centre will have moved slightly south and east.[12][13][14]
Centre of England
For centuries the parish of Meriden to the west of Coventry has claimed to be the geographical centre of England, and there has been a stone cross there commemorating the claim for at least 500 years. The justification is that the point farthest from the sea is in the parish.Script error: No such module "Unsubst". Morton, Derbyshire also claims to be the centre of England as it is not only midway along England's longest north-south axis,Script error: No such module "Unsubst". but also midway between the east coast and the Welsh border.Script error: No such module "Unsubst". Claims are also made for a tree, the Midland Oak, in Leamington Spa, Warwickshire, although the basis for these claims is not clear.
See also
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References
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- ↑ BBC News (calculation made by Ordnance Survey) 16 September 2014
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- ↑ The Centre of Britain Script error: No such module "webarchive"., Centre of Britain Hotel, Haltwhistle, Northumberland. Accessed May 2012
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Further reading
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