Revealing mistake: When everyone's back at the flat, as Del Boy is looking straight down the hallway to his and Rodney's bedroom, someone comes up to him and he turns around. When it goes from his close-up to the wide shot of everyone else the shadow of the camera reversing backwards is visible for a few seconds.David Hutchinson
Visible crew/equipment: When Del and Rodney are sitting in the van after the auction you can't see into the back of the van for huge boxes. When they start shouting and screaming the camera angle changes to show the van rocking from a distance, and you can see someone in the back of the van through the back windows banging against the side of it.
Revealing mistake: When Del is trying to sell those hooky toy dogs, there are some shots of the policeman walking across the street. The same clip of that policeman is played twice, only one is longer than the other (note a grey-haired man walk across the screen twice). (00:01:35)