Berlin! H-P-B, thanks for the mention - it is the centre for my happy memories - but not the correct answer.

Greg, I'm not really worried about where the 'centre' is. My husband always said that Coventry and Meriden were furthest from the seas around us, and having been to the east Coast just 3 weeks ago I can vouch for the coastal erosion, the road sign warning of the problem is currently 3 feet below the original level of the road...
Be happy to be in the middle of wherever, your universe, the dartboard or whatever place you have in mind.
Hope to see you in the centre of Beverley some Sunday soon - if you can tear yourself away from middlesearch!
H.