In the police station, the Sergeant (Stratford Johns) pours himself a mug of tea, reaches under the counter and brings out a bag of sugar, puts 2 spoons of sugar in his tea, looks up at the crowd, then reached under the counter again, brings out a bag of sugar and puts 2 spoons of sugar in his tea.
At 21 minutes: when policeman Jimmy Edwards is standing on the pavement outside the police station, the houses in the background have red brick bay windows, but in the next clip, as the plank car drives by and the camera pans around, the houses in the background now have white painted bay windows which shows that the two clips were filmed at two different locations.
In the final clip of the end credits, the location name Cavesham should have been spelled as Caversham.