The Making of Private Pike - S9-E2
Continuity mistake: In this episode, Captain Mainwaring was given a new staff car. However, he already has one from S7 E5, The Captain's Car. What happened to the previous one is never explained, and surely he would not lose all reluctance to accept the job if he already had a staff car?
The Making of Private Pike - S9-E2
Factual error: When Private Pike is on parade and keeps looking at his watch so he is not late for his date at the cinema, the watch is too modern for the period.
Continuity mistake: In this episode Mrs. Fox's first name is Mildred, but in "Mum's Army" (5-9) her first name is Marcia.
Answer: The show is a comedy, this was played for comedic effect and to show that in times of extreme fear, in this case about to be crushed by a steam train, the men had an adrenaline surge strong enough to pedal fast enough.