During the final song "All Aboard For Victory", Frank Randle and Harry Korris take their seats in the audience twice.
Col. Rivers is talking to his wife who is sitting in an armchair. He is facing forward, but in the next shot he has turned 90 degrees and his right knee is resting on the arm of the chair.
Sgt. Korris is talking to his wife with Charlie, the lodger, in the armchair about to fill his pipe. In the next shot, the pipe and tobacco have disappeared and he is now rubbing the back of his head and yawning, as if he is tired.