The League of Gentlemen
For those who both loved and hated TLEG, I highly suggest a screening of 'The League of Gentlemen' (1960).
It's a superb British heist film (and a ton of fun too!) that many claim served as homework the real-life 'Great Train Robbers'; as well as the source novel being an inspiration for films such as 'Ocean's Eleven' & 'The Italian Job'.
Not certain about the latter claims, but I can see why such rumours abound...