Plot hole: Rodney follows Denzil all the way to Hull. However, it's established that Rodney is a fair distance behind Denzil several miles at least. How is it that Rodney knows exactly where Denzil has gone? He doesn't know Denzil's destination as he says to Del "he must have a load to pick up".
Big Brother - S1-E1
Other mistake: When Grandad is playing draughts on the talking chess game, the voice on the game talks before he presses the button.
Continuity mistake: In the scene with Rodney on the balcony with Del about to join him, there's a big window behind them, and in the next shot it's smaller.
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)
Visible crew/equipment: When the butler is pushing the car away, the film crew is visible in the car's paint. (00:06:45)
Danger UXD - S6-E2
Continuity mistake: Albert takes the box of dolls to the van. He then puts the box on the floor and goes back to Del to get the keys. We see Del talk to a neighbor then Albert drives back to Del. When Albert opens the van, the box has gone. (00:37:10)
Continuity mistake: In the season 4 episode where grandad is buried, we see outside the flat and to the right of the door as you look from inside the flat is a wall. In this episode, Boycie runs out of the flat and goes to the right.
Visible crew/equipment: When Rodney and Del are talking in the pub a boom mic is reflected in the picture above Rodney. (00:24:30)
The Unlucky Winner Is... - S6-E4
Continuity mistake: The amount of wine in the bottle at the start changes from when Uncle Albert comes into the room to when he takes it back to the kitchen. (00:06:25)
Continuity mistake: When Albert walks out the store at the start he has a box of shopping. When he gets to the manager's office, the position of items in the box has changed. (00:05:20)
Continuity mistake: The colour of the toilet rolls changes from pink to green while in the office. (00:06:15 - 00:17:40)
Hole in One - S4-E3
Revealing mistake: When the post is being posted through the door, you can see the letters appear in the letterbox and then wait a few seconds for Albert to hang his coat up before being pushed through. (00:01:00)
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.
The Second Time Around - S1-E4
Revealing mistake: When Grandad is speaking strangely and telling Del that Pauline has hidden his teeth, you can see his bottom set of teeth.
Character mistake: During the scene of the dinner, James (Raquel's father) states that he was in the Royal Navy and was "First Officer" (1/O). The Navy does not have this rank since it is a Merchant Navy rank. The rough equivalent of this is Lieutenant in the RN and Albert would've known this but didn't mention anything. It is also extremely unlikely that an officer the RN would still be Lieutenant after doing his full quota of 12 years service.
Continuity mistake: When Sid is preparing Slater's food, keep an eye on Sid's cigarette. In one shot, it is normal length, but in the next, it is virtually gone.
Revealing mistake: When Denzil thinks he's going mad seeing Del cross the road, look at the zebra crossing Del is walking on. It's just a bit of carpet rolled down on the ground. (00:49:48)
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)
Revealing mistake: At the end of the episode when Del and Rodney get hit by the car, Del jolts forwards slightly before we hear the sound of the crash. (00:29:10)
Visible crew/equipment: When Del tells Rodney he should tell the women what he sold that day, a boom mic is visible at the top of the screen. (00:29:05)
Chosen answer: An apparent long string of illnesses.