On August 8, 1963, a Royal Mail train was ambushed near Cheddington, Buckinghamshire, by a gang of 15 men.
Using a fake signal to stop the train, the robbers incapacitated the crew and made off with £2.6 million in cash.
The meticulous planning and execution led to one of Britain\'s most infamous crimes, resulting in extensive manhunts and changes in UK security systems.