Ian Wilson appears briefly as an evangelist, walking past the camera in the crowd outside Aunt Dolly's home during the strike. He then reappears as a union man in the TV audience (he is hit in the face and a close-up shows his reaction). They could be the same character, but nothing in the film connects them.
In the shot preceding Stanley Windrush placing his bowler hat on the conveyor belt you can see the hat already on the conveyor.
When the strikers march to the managing director's office, five men start the walk, but only four arrive. This was due to Sam Kydd having a cold, and taking the day off.
Stanley Windrush sat on the fork lift truck and spoke with Fred Kite. from behind Stanley, his tie flaps wildly in the wind. Viewed from Stanley's front, his tie is quite undisturbed.
In Bertram Tracepurcel's office after the time & motion study, the way that Mr. Waters holds the file changes between shots.
Stanley Windrush demonstrates his fork lift truck driving skills for Mr. Waters. He says:
"Well, I'm shifting these generators from the stores to here, for loading up."
He drives over a bump and the (presumed full) boxes bounce as though they were empty.
Aunt Dolly is chauffeur-driven to Stanley's digs at Fred Kite's House. As the Rolls Royce turns the corner, the actors cast shadows in two directions.
When Mrs. Kite and Cynthia are reading the newspaper reports about the strike, Mrs. Kite briefly turns a paper over while setting it down. The bottom half is blank--the prop papers were made up only on the side that would be seen in the shot.
Aunt Dolly approaches the front door of Fred Kite's house and casts two shadows.
When the workers leave the "Missiles" factory to go on strike one sign is seen to read "Missles Ltd Car Park".
Dennis Price, properly noted in the closing credits for his role as Bertram Tracepurcel, has his given name spelled with only one "n" (Denis) in the opening credits.