This is by no means my area of expertise. I understand Rome was, though. Gimme time and I'm sure I can dig out some more examples. China's where I'll look first.
It's kind of beside the point in any case. I'm not suggesting that the city of London was designed geomantically in the manner that I've heard Rome was, when I think about it. More that the sacred landscape/whateveryoucallit that was there before London has influenced London's development.