Most of this film takes place in prison and portrays prison life as some kind of Beano-vision, youth club version of incarceration. Apparently, every criminal in the '70s was a decent sort who had the misfortune of getting caught. We'll ignore the fact that, in reality, they were probably a right shower of cunts. This being (loosely) based on fact does make me curious about a few things though. Mostly:
How factual was the paper mache prison escape?
Was McVicar really that much of a midget?
How did Stephen Berkoff manage to ever get hired again after this film?
Very flawed, but worth a look, especially to get a peek at Britain four decades ago.