Nightmare in Royston Vasey - S1-E3
Continuity mistake: The Tortoise gets thrown off Barbra's car into a window cleaners bucket, but if you look at the shot again, the Tortoise, when thrown off the car, goes nowhere near the bucket, but lands perfectly into it in the next shot.
How The Elephant Got Its Trunk - S3-E6
Continuity mistake: Papa Lazarou's black/brown and white face is supposed to be his real skin, however it is very different to his photograph.
Suggested correction: Do you mean the photo of the real Keith Drop when they are in the house with Brian and the lady from the charity shop? If so that person is not supposed to look like Papa Lazarou with black/brown/white face as it's in fact a photo of the person he is impersonating and whose identity he has stolen, e.g Keith Drop when who has the appearance of a white man, hence why Papa is painting his face with make up to look like him.