Revealing mistake: In the scene where Kirsty is in the Porsche at the beginning of the film, the car flips whilst on the gravel car park. You can see the device (log or metal rod) that helps flip the car. As the car rolls you can also see the hole in the bottom of the car where the flipping device had come from. (00:05:00)
Revealing mistake: When Kirsty breaks them out of the police jail with the van she stole, you can see the fake wall created, as it built out of line with the real wall.
Factual error: The bank Steve Coogan wants to rob is in Manchester. When he sees the bank for the first time, we see a CMT bus drive past behind him. CMT buses operate in Liverpool, not Manchester.