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This is a true story about Commander “Buster” Crabb, a British naval frogman who disappeared whilst undertaking an underwater ‘spying mission’ involving the Soviet cruiser Ordzhonikidze in 1956. Just over a year after he disappeared a body washed up, headless and handless, near Portsmouth. The Establishment took charge of the body and, at an inquest, declared it to be Crabb’s body. However, vital evidence was omitted and key witnesses not called.
It is now known that it was not his body and he was not buried in Portsmouth at that time. The problem for the establishment was that Crabb worked for the then head of the Royal Navy, Lord Mountbatten. At the time the US government security agencies alleged that Mountbatten was doing ‘unofficial’ business with senior officials within the Soviet Union.
This, of course, would be a valid explanation as to why the whole Crabb story is being held secret and cannot be disclosed for 100 years, meaning that the official papers will not be made public until 2056.
What's left to say to that? OMFG about covers it.