In 1962 the BBC set out to investigate local reports of British secret, shocking World War Two experiments, dangerous contamination and unexplained animal deaths on a remote island off the coast of Scotland.
It was an environmental catastrophe.
The island remained dangerously contaminated and a no-go area for nearly half a century, until, on this day (22nd April) in 1990, the UK government finally declared Gruinard Island safe.
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