Continuity mistake: When Charles Hawtry is about to be beheaded, someone comes up to him saying they have a message for him. He replies with, "Toss it in the basket and I'll read it later." So she throws it in the basket, but in the next shot when you see an overhead view of Hawtry, the basket is empty.
Continuity mistake: When Charles Hawtry is about to be guillotined, Sid James approaches to sell him insurance. While talking Sid places a snuff box on the blade runner just above the stock top. In the next shot the snuff box is much higher up the runner, causing the blade to stop well short of its victim.