Continuity mistake: When the 3 Minis are pushed off the coach, if you look carefully there is view shown briefly of the cars interior, which has red door pillars. When the shot reverts to the external view the cars colour is white.
Continuity mistake: Right at the beginning, the red Lamborghini goes into the tunnel and is blown up, but when it is taken out not one part of the bodywork is charred, it is still a shiny red. Given the huge explosion and fireball we see when the Lamborghini hits the JCB, this is impossible.
Revealing mistake: After stealing the Bullion the gang make off through a shopping mall. As the scene changes to show the Minis descending a staircase it can be seen that the door of the front Mini is wide open and the passenger is getting in as the car moves off. It shows that the car was stationary before the start of the shot and not actually descending the stair.