Character mistake: Ash Morgan tells the grifters that "Anxious" has a basement flat in Camden, and he sends Sean there to get phoney identity papers. It is quite clear that the flat is on the ground floor, not in a basement. The front door opens onto the street.
Plot hole: The cable Emma dangles from is secured to a safe deposit box by a powerful electromagnet rigged up by Ash. When he turns off the power, which he will have to do (they can't leave the cable and magnets in place!), the whole rig will drop to the floor, setting off the alarms. Even under tension, it would be impossible to wind in the cable and magnet fast enough to stop it dropping, and there is no sign of any sort of mechanism that would allow them to try to do that anyway.
Continuity mistake: When Mickey seduces the MI5 agent, when she says to him, "You know she wanted to screw you?", Mickey has his hands on his hips. However, in the covert video recording of that same meeting (shown at the end of the episode), Mickey now has his arms crossed at the same point she makes that comment. (00:32:44 - 00:53:10)
Continuity mistake: At the end of the episode, the final glass on the tray shifts position. First, it's directly at the front of the tray in the middle, but then it shifts to being on the left-hand side. The position of the cork and the foil also shifts. (00:57:44)
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.
Character mistake: When Mickey and Emma are trying to get access to the university labs, they claim they are working for Ofsted, and are investigating exam manipulation allegations. In fact, Ofsted have never been responsible for supervising/investigating universities - they only cover places of education up to the age of 18. The Ofsted equivalent for universities is the QAA.
