Slightly off thread, but English Heritage publish an extremely interesting book called "COLD WAR-Building for Nuclear Confrontation 1946-1989" The ISBN is 1 873592 69 8. Highly detailed, it runs the gamut from shelter design, through AD to radar and missile installations, finishing off with a rather quite scary list of Britain's Nuclear weapons and their cost. IMHO It's well worth seeing if the library has one, as £24.99 for a bathroom time filler is quite steep.
I'll just go get me anorak.............................