This is one of those nostalgic British comedy farce films in the vein of the early Carry Ons with some saucy seaside postcard type humour. The story is essentially a crime caper set in a prison where three hapless criminals plan to escape for one night, steal a haul of diamonds and get back inside before morning giving themselves the perfect alibi. Their plan is thwarted by the arrival of a new chief prison officer who is a strict disciplinarian. If you love these old British comedies and are a fan of the TV series Porridge you'll enjoy this and will clearly see the influence of this film on that iconic comedy show. Peter Sellers (who was notoriously difficult on set) plays the leader of the criminals and Lionel Jeffries is the martinet officer, Grout. There's a host of stalwart British comedy actors including Wilfred Hyde White, Maurice Denham, Liz Fraser, Irene Handl, Beryl Reid and Bernard Cribbins and more. This is fun, occasionally a little silly, but if you grew up watching these great British films this will be a joy.