Other mistake: When Mrs Slocombe is having her passport picture taken the images taken are not directly in front of them where the actual photo camera is, rather they are taken from the camera filming off to the side.
Are You Being Served? The Movie (1977)
1 mistake
Directed by: Bob Kellett
Starring: Frank Thornton, John Inman, Mollie Sugden, Trevor Bannister
Trivia: In this movie, Penny Irving plays Young Mr. Grace's new secretary, Miss Nicholson. In the TV series, she was called Miss Bakewell.