Depends on which country though...
England is now said to be Fenny Drayton, previously having been Meriden.
http://www.bbc.co.uk/news/uk-england-le ... e-22890463
That's using the centroid method. Other countries, using this method, are:
* United Kingdom of GB & NI - A position "in the middle of Morecambe Bay", approximately 1.5 miles (2.4 km) off the coast at Morecambe, Lancashire
* Great Britain (including off-shore islands) - Whitendale Hanging Stones, near Brennand Farm, outside Dunsop Bridge, Lancashire in the Forest of Bowland
* Great Britain (excluding off-shore islands) - A field south of Calderstones Partnership NHS Foundation Trust, near Whalley, Lancashire
* Wales - Near Cwmystwyth, Devil's Bridge, Ceredigion
* N Ireland - Annaghone, near Cookstown, County Tyrone
* Scotland - Between Blair Atholl and Dalwhinnie, Perthshire
Thank you Wikipedia for that information -
https://en.wikipedia.org/wiki/Centre_po ... ed_Kingdom