Where is the exact centre of London England, latitude and longitude please?
That depends on how you define “center” of London. In modern times, the centre of the urban area is roughly Trafalgar Square, which is at latitude 51° 30′ 27″ N, longitude 0° 7′ 40″ W. But when the city was founded, Trafalgar Square would have been considerably west of the city. The center of the oldest part of London is right around the Monument, at the north end of London Bridge: latitude 51° 30′ 37″ N, longitude 0° 5′ 12″ W.