If They Could See Us Now...! - S9-E1
Visible crew/equipment: Just as Rodney says "Unbelievable", when he realises he was to blame, as the shot changes to Del, the boom mic is visible in the top right corner for a split second. (00:13:30)
If They Could See Us Now...! - S9-E1
Visible crew/equipment: When Cassandra is explaining why the fancy dress party is early, as she walks off, a boom mic comes into shot and is easily visible above Rodney's head.
If They Could See Us Now...! - S9-E1
Visible crew/equipment: Just after Rodney throws the phone on the couch after talking to Mickey Pearce, Cassandra comes out of the bedroom. At the top of the screen, a boom mic is visible for a split second.
If They Could See Us Now...! - S9-E1
Visible crew/equipment: When Del is on the TV Show "Goldrush", he asks to phone Rodney to help him out on a question. As Rodney is watching the show and listening, you can see the camera reflected in Rodney's TV.
Strangers on the Shore - S9-E2
Other mistake: Boycie asks to sleep in the Trotter's flat after being chucked out of his house and not allowed back in due to a gas leak. He states "I was going to check into a hotel, but I've left everything in the house; wallet, credit card, car keys, the lot... so all I've got is what I'm wearing." He isn't shown to be carrying any luggage. Later in the episode, Raquel complains that Boycie keeps putting on the hair gel that Del added onion puree to at the start of the episode. How was Boycie able to get his hair gel that was in his gas-filled house? One could propose that he asked the firefighters to receive it, but why wouldn't he also ask them to retrieve his wallet/credit card so that he can book into a hotel rather than sleeping on the sofa in the Trotter's overcrowded flat? (00:58:00 - 01:05:00)
Strangers on the Shore - S9-E2
Continuity mistake: When Del takes his washing up gloves off to chat with Boycie's neighbour, he is not wearing any rings. But when he goes into the house and grabs Marlene's behind, he is now wearing two rings on his hand.
Strangers on the Shore - S9-E2
Deliberate mistake: When Del, Rodney and Boycie first arrive in France, there is a side view of the white van they are in and it is clear that the driver is definitely not David Jason.
Strangers on the Shore - S9-E2
Plot hole: If Lenny Corby was fitting gas fires in Boycies house, then wouldn't Del notice him there while he was cleaning the cars? He must be there at the same time because he tells Rodney about it on the same day as he was at Boycies.
Continuity mistake: In Season 2's episode "The Yellow Peril" we see the boys' mum's grave. However in this episode the layout and surroundings have completely changed. (00:05:15)
Continuity mistake: When Del is going on about the plastic surgeon in Rodney's screenplay, the way he holds the bottle of drink keep changing through instant cuts. (00:19:50)
Continuity mistake: In 'The Frog's Legacy' (1987), Del & Rodney learnt the story of Freddy The Frog for the first time - neither of them had ever heard of him before (Aunt Irene explains to Del who Freddy was. She mentions both 'Freddy The Frog' and his real name 'Frederick Robdal'. Del has heard of neither of these names). Yet in 'Sleepless in Peckham', it would seem that Del had known Freddy since he was 15. He even went on their first Jolly Boys' Outing with the rest of the gang.
Continuity mistake: In one episode, Del tells Rodney that he was born 13 years after him. Yet in this episode, when looking at the picture, Rodney says that Del is 15 and that he hadn't been born at the time the picture was taken.
Chosen answer: An apparent long string of illnesses.