I loved this movie when as a child I first saw it. As with so many old movies, I never managed to see it again for many years. I can't imagine anyone not enjoying a lunatic farce starring Sim, Rutherford and Grenfell at their best!
During WW2, two schools are told they must share one building. Each Head assumes the other school will be of the same sex as their own, but not so. At first the Heads are horrified but eventually they have to work together when parents are due to descend to see the schools of their darlings at work, and pupils and teachers work together in hilarious scenes moving from room to room so parents can see lessons and games.
Priceless old movie, one of the very best. Would give it 6 stars if I could!