Kelvedon Hatch, just outside London, was one of Britain's top secrets during the Cold War. Built in the 1950s into the hillside, this colossal underground bunker was to house more than 600 people and to keep them going for up to 3 months – had Britain come under a nuclear attack from the East.

The Royal Air Force was to control from here its response to a nuclear attack. It was also to become the HQ of an emergency central government, including the Prime Minister's office.

Complete now with wacky mannequins!