A gang of juvenile delinquents tear up post-war London in Lewis Gilbert’s shocking and energetic x-rated drama A gang of juvenile delinquents tear up post-war London in Lewis Gilbert’s shocking and energetic x-rated drama.? Roy (James Kenney) is a brash, chain-smoking thug who bullies his friends (including Rene, played by a young Joan Collins) into subservience. He and his gang assault and rob people on the street, but things get increasingly dangerous when their behaviour escalates to murderous consequences. ? Unafraid to tackle a host of taboo subjects, Cosh Boy is a penetrating portrait of 1950s Britain and its simmering social tensions. One of the first British films to receive an ‘X’ certificate, this landmark classic is available on Blu-ray for the first time and is the 40th entry to the longstanding BFI Flipside catalogue. Browse more BFI Flipside titles