Continuity mistake: The layout of the flat changes throughout the course of the show. Most noticeable is the area by the bedrooms. In series 2 it's a tiny little hall. In series 7 it's a sprawling hallway.
Big Brother - S1-E1
Continuity mistake: At the start of the episode when Del walks behind Grandad's chair, the way he is holding his jacket changes between shots. (00:01:15)
Big Brother - S1-E1
Continuity mistake: At the start of the episode when Rodney and Grandad are arguing, Del walks past Grandad and past the chair next to him, yet in the next shot he walks past the chair again. (00:01:15)
Big Brother - S1-E1
Continuity mistake: When Del and Rodney are talking and Del explains how everything is split 60-40, Del's collar is under his jacket. Camera cuts and the collar is over the jacket. (00:03:50)
Big Brother - S1-E1
Continuity mistake: When Trigger walks in, the amount of head on the drinks of Rodney and Del changes instantly. (00:08:20)
Big Brother - S1-E1
Continuity mistake: When Trig and Del are talking about the briefcases, the level of drink in the glasses on the table changes with no one having a drink. (00:10:50)
Big Brother - S1-E1
Continuity mistake: When Del and Rodney have a fight in the flat, the briefcases move from the sofa to the table. (00:19:50)
Continuity mistake: At the start of the episode when Del drinks his tea, he picks up the cup with the spoon still in it. When he puts it down the spoon has gone. (00:02:20)
Continuity mistake: When the waiter is writing down the drink orders, if you look carefully, you can see that he is only pretending to write.
Continuity mistake: Near the beginning of the episode, when Del talks about his Polaroid, there are no extras walking behind him. The shot changes quickly to Rodney, then to a wide shot of both Rodney and Del in which time the 2 extras walking in front of Vimmal have manages to walk down the stairs behind them. (00:02:30)
Continuity mistake: When Del is at Vimmal's house, he drops his biscuit in his tea, yet when he takes it out again it is dry. (00:13:00)
Continuity mistake: When Del put the money on Vimmel's table, the statue jumps from the table to Del's hand between shots. (00:23:30)
The Second Time Around - S1-E4
Continuity mistake: At the start of the episode, Del hands the box of tissues to his customer, but in the next shot the box has jumped into the hands of the man standing next to her. (00:00:40)
A Slow Bus to Chingford - S1-E5
Continuity mistake: When Del is offering Rodney the NSO job, the amount of drink in the glass keeps changing. (00:04:25)
A Slow Bus to Chingford - S1-E5
Continuity mistake: When Rodney is saying to Del about him being stood under a neon sign saying "T.I.T." his arm moves from behind Del's head instantly. (00:26:20)
The Russians Are Coming - S1-E6
Continuity mistake: At the start of the episode when Del say 'a butcher or chemist' Rodney is looking straight forwards. In the next shot he is looking at Del. (00:01:30)
The Russians Are Coming - S1-E6
Continuity mistake: Just before Grandad suggests building the shelter in the New Forest, as Del goes to look the plans for the shelter you can see Grandad sit forwards in his chair. In the next shot Grandad is now sitting back. (00:06:55)
Continuity mistake: When Del hangs his coat up on the peg in the hallway, the whole stage wall shakes when the coat falls off. (00:02:20)
Continuity mistake: When Del discovers grandad talking to Arthur, he sticks his head through the door. Camera cuts and he sticks his head through again. (00:13:00)
Continuity mistake: At the beginning of the episode, when Del is about to leave the restaurant, the front door has a "Closed for redecoration" sign on it. When the shot changes to the outside, however, the sign is gone.
Chosen answer: An apparent long string of illnesses.