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The Kelvedon Hatch Secret Nuclear Bunker was designed for up to 600 military and civilian personnel, including the Prime Minister, their collective task being to organise the survival of the population in the aftermath of a nuclear war. It was built into the side of a hill, was three storeys high, and you entered through a disguised bungalow at the lowest level and worked your way up. On top of the bunker was this 150 feet high radio mast.

The sights inside include a hospital ward with an operation taking place, another patient lying in bed and coffins against the wall! A Government information film shows a whole street on fire after a nuclear strike and people being encouraged to rush out with buckets of water to try and put the fires out. At least the commentator on the tour was more realistic - "after three months down here there would be nothing to come up for and there would just be roaming bands of zombies so you might as well take your cyanide pill" and "the aim of the government was to keep you occupied for a few weeks because by then you would be dead."

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