The Great Train Robbery

Shout and we'll kill you! Threats and violence were part of the Great Train Robbery of 1963. Its loot was, at that time, the largest amount of cash ever stolen in Britain. The Crime of the Century seemed to be perfectly planned and executed, but police aimed to show that they'd find those involved and bring them to justice. Would they succeed or would the daring criminals involved in the crime escape with the cash?