The centre of Great Britain and other areas.

Centre of Great Britain - Mainland only 5.5 km SW of Clitheroe. Between Whalley, Billington and Calderstones Hospital. Grid Reference: SD 72321.72 36671.1.

Great Britain Mainland plus the 7 major islands of Isle of Wight, Anglesey, Arran, Mull, Jura, Islay and Skye. The Eastern Edge of Longridge Fell, 1.5 km south east of Walker Fold and 1km north west of Turner Fold. Grid Reference: SD 68123.7 41406.29.

Centre of England (mainland only) Lindley Hall Farm, 1.5 km east of Fenny Drayton and 5 km north of Nuneaton. Grid Reference: SP 36382.2, 96810.73.

England (including all surrounding islands) Between Lindley Hall farm and Lindley Grange 1.5 km east of Fenny Drayton and 5 km north of Nuneaton. Grid Reference: SP 36373.66 96143.05

England and Wales Hurst Green Farm, 2 km west of Curdworth south east of Sutton Coldfield. Grid Reference: SP 15627.33 92949.96.

Wales (mainland only) 3.5km north west of Claerwen Reservoir, next to Afon Claerddu. Grid Reference: SN 81162.99, 67795.6

Wales (including all surrounding islands) 7.5 km north west of Claerwen Reservoir and 2.5 km south of Cwmystwyth. Grid Reference: SN 79728.22 , 71704.43.

Scotland (mainland only) 0.5 km west of White Bridge on the B846 (General Wade's military road)and 5.5 km south of Tummel Bridge. Grid Reference: NN 76731.26, 53751.42

Scotland (including all surrounding islands) 3 km east of the northern tip of Loch Garry. Grid Reference: NN66784.93, 71599.4.

Great Britain (including 401 islands) 7 km north west of Dunsop Bridge on Whitendale Hanging Stones Grid Reference: SD 64188.3, 56541.43. Centre of London 300m east of Waterloo Station. Grid Reference TQ31330.87 79647.52.

Northern Ireland (including all surrounding islands) Grid reference: 97004.44 533740.17

Northern Ireland (mainland only) Grid Reference: 96962.33 533666.07

Source: Strategi for Country Calculations and Boundary Line 1999 (Districts) for London.