Continuity mistake: At the beginning of the film in the cinema Sid's ice lolly has two bites at the side. Shortly afterwards, with no new bites taken, they're different shapes.
Continuity mistake: When Sid drives his car around the bed on his way to picking up Joan and Anthea, he passes two girls walking down the pavement, but in the shot from the rear window, the girls have disappeared.
Revealing mistake: During the keep fit session, Babs' bra is seen falling off in a downwards direction, yet it still manages to hit Dr Soaper in the face.
Revealing mistake: When we see the coach driving down the country lane, you can see that the driver is not Julian Holloway but his stunt double.
Continuity mistake: When Matron goes over to see Dr. Soaper in his tent, the tent next to Soaper's has two chairs outside, but in the next shot another chair has suddenly appeared.
Continuity mistake: As they are about to leave in the car in front of the house, Mrs. Fussey is right behind Sid as he walks round the car. However, when you see the next shot she is far behind him.
Continuity mistake: Whilst walking down the corridor in the school, Miss Haggerd hears a noise coming from the classroom. She goes to the door and opens it with her left hand, but in the next scene she is seen opening the door with her right hand.
Continuity mistake: When Sid puts his feet into the pot of Joan's stew, you can see that Anthea is sitting down peeling vegetables and she is nowhere near Sid. But when Joan says, "Sid, my stew!" the scene changes to a close-up of the pot, and Anthea is now sitting next to Sid.