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.
Chosen answer: An apparent long string of illnesses.