If you were to browse a British newsstand in the early 1980s, you might have discovered a rather unusual magazine.

Called Protect & Survive Monthly or “PSM”, it aimed to teach people how to survive the almost unthinkable – nuclear war.

“How many citizens would know what to do to protect their own lives and loved ones?,” wrote editor Colin Bruce Sibley in the maiden issue. And how many, he asked, would look dumbfounded to the skies, “waiting for a ‘convenient’ bomb to explode above their head and blast them into eternity?”