Originally Posted by
xenole
Probably bunkers down there somewhere.
Well the most famous is the Defence Crisis Management Centre (Which is under the MOD

- oops) and you can see some of it here
http://www.wired.com/rawfile/2011/01...unker/?pid=625
There is a Russian site with a translation of the original Daily mail article from 2008 but I'm not sure how safe that site is so I'm not posting a link but it's easily found via Google.
Also have a look through the air vent grills at the QE2 Centre which are at street level. Through one of these grills you can see some stairs and an 'interesting' notice on the wall.