Set during September 1949, confusion reigns when St Swithin's Girls' School is accidentally billeted at Nutbourne College: a boys' school. The two heads, Wetherby Pond and Muriel Whitchurch, try to cope with the ensuing chaos, as the children and staff attempt to live in the newly cramped conditions, and seek to prevent the children taking advantage of their new opportunities. Additional humour is derived from the departure of the Nutbourne College domestic staff and their hurried replacement with the St Swithin's School Home Economics class. The main comedy is derived from the fact that the parents of the St Swithins girls would consider it improper for their daughters to be exposed to the rough mix of boys in Pond's school, and from the consequent need to conceal the fact that the girls are now sharing a school that's full of boys. Pond is offended at the suggestion that his boys are not suitable company for the young ladies of St Swithin's, but he needs to appease Miss Whitchurch to salvage his chances of an appointment to a prestigious all-boys school for which he is in the running, and which depends on his ability to prevent his current post presenting the appearance of a beer garden. Matters come to a head when a group of school governors, from the prestigious establishment to which Pond has applied to become the next headmaster, pay a visit at the same time as the parents of some of the St Swithin's girls. Frantic classroom changes are made, and hockey, lacrosse and rugby posts and nets are swapped about, as pupils and staff try to hide the unusual arrangement. Two simultaneous tours of the school premises are arranged: one for the girls' parents, and a separate one for the governors, and never the twain must meet! The facade finally collapses when the parents become obsessed with seeing a girls' lacrosse match at the same time as one of the governors has been promised a rugby match. The punchline is delivered – a clever swipe at post-war bureaucracy – when, weeks too late, a Ministry of Schools official arrives, to declare everything sorted out. "You're a co-educational school, I believe; well I've arranged for another co-educational school to replace St Swithin's next week... Oh, it appears they're ahead of schedule." At this point, several more coachloads of children and staff appear noisily, and utter chaos reigns. Fade out on Alastair Sim and Margaret Rutherford, quietly discussing in which remote and unattractive corner of the British Empire they might best try to pick up the pieces of their respective careers, with her mentioning having a brother who "grows groundnuts in Tanganyika."
The Monthly Film Bulletin noted an "Uninhibited and energetically handled farce...Occasionally slapdash, but frequently amusing"; and The New York Times called it "witty, warm, sometimes biting and wholly charming." BFI Screenonline states that Alastair Sim's portrayal of headmaster Wetherby Pond "is one of his greatest creations", but that both he and Margaret Rutherford were "decisively upstaged" by supporting actress Joyce Grenfell, as one of the teaching staff of St Swithin's.
Box Office
The film was successful on its release, being the fifth most popular film at the British box office for 1950. According to Kinematograph Weekly the 'biggest winners' at the box office in 1950 Britain were The Blue Lamp, The Happiest Days of Your Life, Annie Get Your Gun, The Wooden Horse, Treasure Island and Odette, with "runners up" being Stage Fright, White Heat, They Were Not Divided, Trio, Morning Departure, Destination Moon, Sands of Iwo Jima, Little Women, The Forsythe Saga, Father of the Bride, Neptune's Daughter, The Dancing Years, The Red Light, Rogues of Sherwood Forest, Fancy Pants, Copper Canyon, State Secret, The Cure for Love, My Foolish Heart, Stromboli, Cheaper by the Dozen, Pinky, Three Came Home, Broken Arrow and Black Rose.
Legacy
The Belles of St Trinian's is a similar comedy about a girls' school at which chaos reigned, which was also produced by Launder and Gilliat and featured several members of the cast of The Happiest Days of Your Life, including Alastair Sim, Joyce Grenfell, George Cole, Richard Wattis and Guy Middleton, with Ronald Searle providing the cartoons for the titles.