Rent The Pure Hell of St. Trinian's (1960)

The fourth form monsters latest trick is their best ever - they've burned down St. Trinian's! As the school stands trial, the police breathe a sigh of relief but miraculously the judges infatuation with Rosalie, the beautiful blonde of the sixth form, means the school is freed. And with them go the most glamorous sixth formers ever seen in gym slips. For authority it means a new reign of terror, as with gleeful anticipation the girls of St. Trinians regroup.