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Portillo’s Hidden History of Britain Season 2 Episode 3

Michael Portillo visits a top-secret Cold War stronghold, just a mile from the Cambridge campus where he spent his university years. The bunker, formerly known as RSG-4, was built in 1953 to house 300 local government officials from Cambridgeshire in the event of a nuclear attack. The former politician is also given access to the decommissioned Soviet nuclear submarine U-475 Black Widow – currently moored at Strood on the River Medway – revealing how close the world came to a full-scale nuclear war.

Episode Title: Countdown to WW3

Air Date: 2018-11-16