Tony Finch said:
Clive is right: either Charing Cross or the GPO are the proper locations to use for London. I would vote for Charing Cross, but that's just personal preference.
Note that you want the original location of Charing Cross. It was rebuilt in the 19th C. in a new location. The closest landmark now is the statue of Charles I at 51d30'26"N, 0d7'40"W (or 51.5073,-0.1277 in decimal).
Note that the GPO is where road distances used to be measured from, while Charing Cross (the present, not the original) is what most locals would say if you asked them. While I agree the cross itself has moved, I'm not sure the old location was ever thought of as "the centre of London". -- Clive D.W. Feather | Work: <clive@demon.net> | Tel: +44 20 8495 6138 Internet Expert | Home: <clive@davros.org> | Fax: +44 870 051 9937 Demon Internet | WWW: http://www.davros.org | Mobile: +44 7973 377646 THUS plc | |