In addition to its disguise, the bunker was fortified with deep layers of earth and concrete to absorb bomb impacts. It was on a visit to the bunker when wartime prime minister Winston Churchill ...

Hackman's book, called Metamorphosis, shows the bunkers as they appear today. Hackman says: "Concrete fabrication factories in every municipality began constructing bunkers 24 hours a day ...

Jon Graves, 37, bought the bunker that was once used to monitor for radioactive explosions across Britain only to find it ...