When the BBC commissioned the film in December 1964, its incoming head of programmes, Huw Wheldon, described it as “horrifying and unpopular – but surely necessary”. A year later, it was canned by his superiors. “Too horrifying for the medium of broadcasting,” said the press statement. The writer-director, Peter Watkins, quit his job in disgust.
Source: The War Game: The BBC banned this horrifying tale of a nuclear attack on Kent