For almost 60 years, the evidence of Britain's clandestine torture programme in postwar Germany has lain hidden in the government's files. Harrowing photographs of young men who had survived being systematically starved, as well as beaten, deprived of sleep and exposed to extreme cold, were considered too shocking to be seen.

As one minister of the day wrote, as few people as possible should be aware that British authorities had treated prisoners "in a manner reminiscent of the German concentration camps".

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