New Recruits - S5-E2
Continuity mistake: When the gallery is initially shown, it is covered with red banners. When it is shown at the end of the episode, the banners have vanished. (00:45:17 - 00:57:15)
The Delivery - S7-E6
Revealing mistake: Eddie's bar has just burned down, and everything is ruined. However, the glasses above the bar are pristine and clean. At the very least, they'd be blackened and smeared by the smoke and soot, even if the heat of the fire hadn't destroyed them. (00:10:28)
Ding Dong That's My Song - S8-E5
Character mistake: When footage of Dale's gameshow is shown, the announcer states that it is coming to viewers live on a Friday. However, Ash later states that the show was shown to viewers live every Saturday.
Factual error: The gadget Ash gets Shaun to hide inside the bank vault deposit box is essentially a large and extremely powerful electromagnet. An electromagnet powerful enough to support a grown woman's weight (which it does later in the episode, when Emma uses it) would require significant power: either from a mains supply of electricity (which isn't possible, given the device is locked inside a deposit box), or else from batteries far larger than what could fit inside the gadget as shown on screen.
The Henderson Challenge - S3-E2
Visible crew/equipment: As Danny (who is supposedly naked) gets into the taxi, you can see he's wearing some kind of flesh-coloured thong. (00:11:35)
Continuity mistake: Shiro cuts Stacey's right cheek with his sword, drawing blood. However, in subsequent shots, Stacey's cheek is completely unmarked, and there is no sign of any cut or blood. (00:32:46 - 00:33:58)
Getting Even - S4-E3
Factual error: Ash gives Albert a slip of paper with Lily's home address, including a postcode of WC2E. That postcode is in Central London, but the house Albert then goes to is somewhere far more suburban, a long way from WC2. (00:50:21 - 00:55:22)
Continuity mistake: When Danny and Stacey walk into the Human Resources office, a shot of the woman behind the desk shows the glass countertop has nothing on it. However, when Stacey spins the monitor around, a mouse suddenly appears in the next shot on the glass countertop. (00:30:05)