The War Game (1965) on Netflix

Filmed as a docudrama, this documentary seeks to inform the British public of the impact a nuclear attack would have on the UK. After confirming that few in the general public know about nuclear energy and its possible impacts the film moves on to suggest there would be forced relocation to sites outside of London, forced billeting and food rationing. The film then moves on to the real issue: that most of England would be destroyed (or at a minimum become unlivable) in a nuclear attack. This program was commissioned by the BBC but not shown on television as they thought it to be too frightening.