The author cites London as being a desirable city given the historical lack of disasters, steady government, and cultural preference for preservation etc. London was also my first thought as a safe haven for a long lasting build.

On the other hand, I can't help but feel London would be an obvious target for nuclear annihilation in some future conflict; UK commerce / industry / power / wealth is deeply centralised in London.

A better option would be to stick to the UK, but maybe a 100 miles outside of London proper.