Revealing mistake: When the stripper appears from the changing room during the cabaret scene, the stripper music is heard, but if you look carefully the tape recorder which is supposed to be playing the music is not actually moving.
Continuity mistake: When Fred and Ernie return to their caravan and find their dinner is on fire, they enter the caravan and you can see the door is open. A few shots later, the door is closed without no one having touched it.
Revealing mistake: When the stripper film begins during Professor Crump's lecture, we see a man lighting his pipe. If you watch carefully, the lighted match does not make contact with his fingers, yet he still manages to burn himself in the process.
Continuity mistake: When Professor Crump is talking to Anna Vrooshka in the showers, you can see that Anna's shower has nothing on the door. When Arthur enters and Crump gives him Anna's clothes, her shower has now gained a glass panel.
Audio problem: When Sandra says "It's warm, isn't it?" before she takes off her jumper, her mouth is not moving.
Continuity mistake: When Ernie asks Sandra and Carol if they would like to have dinner with him and Fred, he is holding the cup and saucer in his right hand. In the next shot, he now has both hands on the saucer.
Continuity mistake: During the breakfast scene with Fred, Ernie, Carol and Sandra, Carol puts her hand on Ernie's hand while he is eating his cornflakes and then puts her hand back on the table, but in the following shot her hand is back on Ernie's hand again.
Continuity mistake: When Barnes leaves his caravan after discussing the rent with Professor Crump and Professor Vrooshka, Professor Vrooshka is holding a large knife, but in the next shot she is now holding a briefcase.
Continuity mistake: When Daphne tells Arthur that she won't have swearing after he hits his hand with the mallet, Arthur kicks down the awning on the caravan. At this point, Arthur is holding a mallet, but in the next shot when he is happy and rubs his hands together, the mallet is nowhere to be seen.
Audio problem: When Major Leep says "It's a nice pub this" to Daphne Barnes in the pub, his lips do not move.
Continuity mistake: At the beginning of the stripper film during Professor Crump's lecture, you can see the stripper is wearing tights. When Crump says "We see the sight partially uncovered", the tights have disappeared, and in the next shot, they are back again.
Continuity mistake: When Else enters the butchers' shop at the beginning of the movie, Fred is serving a woman wearing a scarf on her head and behind her is a blonde haired lady. But when Fred says "Hello, Else!" in the next shot, the blonde lady has just been served by Fred and the woman with the scarf is nowhere is sight.
Continuity mistake: When the couple who are about to have their lunch outside their caravan are interrupted by the beach ball, the ball knocks a brown bowl containing salad off the table. After a quick cut to Fred, we return to the couple and the bowl is back on the table again.
Continuity mistake: When Sandra is in Ernie and Fred's caravan, she says to Ernie that their stove isn't working. Sandra then hands Ernie the stove, but when the camera is behind Sandra in the next shot, she hands it to him a second time.
Continuity mistake: When Professor Crump says "I've been shot!" after the tent explodes outside his caravan, a bottle of tomato ketchup starts dripping on him and you can see his pyjama top is completely clean, but after a quick cut to the bottle dripping, we return to Crump, and his top is more dirtier than it was previously.
Continuity mistake: When Joe Baxter enters the shower room, the towel he is carrying has moved from one shoulder to the other.
Continuity mistake: When Major Leep is speaking to Sandra and her friend, the way he grasps his walking stick changes between shots.