Other mistake: When the English guy and Russell are in the car watch the background - all of a sudden it changes.
Suggested correction: When?
Other mistake: When the villains arrive outside Glamcabs yard, to wait for Hattie Jacques as she drives to the bank, watch the driver of their Jag. He somehow changes from a forward gear to reverse, without taking his hands off the steering wheel.
Other mistake: In the scene when Professor Kelp sticks his arm in the punch bowl the fruit juice stains his white jacket sleeve red. When he goes to his laboratory to make more formula to become Buddy Love, his white shirt sleeve underneath his stained white jacket sleeve is still white. It is hard to believe his jacket sleeve would stain and not his shirt sleeve as well.