Porridge (1974)

Norman Stanley Fletcher is sentenced to 5 years at her Majesty's pleasure at HM prison Slade in darkest Cumbria. His naive cell mate Lenny Godber needs to learn the ropes, skives and scams and strict prison officer Mr.Mackay tries to run the prison his own way. And then there's Mr.Barroclough who is just too weak willed to have his good nature exploited.