The first and best of a series of films based on the cartoons of Ronald Searle depicting a demonic girl's school, 1954's The Belles Of St Trinians is a pleasantly anarchic romp. Grenfell again sparkles as a clumsy young bluestocking. She's a police sergeant gone undercover to investigate the dubious goings on at Millicent Fritton's establishment for young ladies, which turn out to include the use of a chemistry lab as a liquor distillery and low tactics on the hockey field which are rather less than jolly. The plot involving the nobbling of an Arab Sheikh's racehorse is negligible, while the schoolgirls shine en masse rather than as individuals. George Cole is a decent spiv but it's Sim who carries the day in a dual role as dodgy bookie and his sister, headmistress Ms Fritton.