Continuity mistake: After the gang is pulled off the bank job, they race away in the three Minis - as they go through a tunnel at one point they roll up and down the sides of the tunnel. The mistake is that each car supposedly has two occupants, but on one shot of the cars in the tunnel, one car has only a single occupant - visible because the car following has his headlights on illuminating the car in front.
Continuity mistake: When the car transporter is trying to break into the building, where they are transferring the gold from the security vehicle, a car drops from the transporter, lands on a police car, and the blue cover from the police light comes off completely in the first shot. But a second later you see the face of the policeman with the light in the foreground, which now has a jagged broken base left on the car. (01:14:30)
Continuity mistake: Each of the Mini Coopers were fitted with three spot lamps on the front grille/bonnet in a triangle formation. In part of the chase sequence through the sewer, two of the Minis have sprouted three more lights - one under each headlamp and one in the centre of the grille under the three original spot lights.
Continuity mistake: The Minis at the end are pushed out of the bus with no rear windows, the Aston pushed over the cliff becomes a Lancia at the last moment, and the Lamborgini pushed over the cliff is so toy-like - it doesn't even have an engine... [Regarding the Lancia, the comment is correct. However, it was a deliberate substitution. The Aston went over the cliff and spontaneously burst into flame almost immediately. The director felt that it looked too fake and the Lancia was substituted to make the stunt longer and more realistic.]
Continuity mistake: When the crooks hijack the bullion van, one of the crooks starts covering the van's windscreen with blue paint. He manages to get two small squirts of paint on the windscreen. However, when the camera cuts to Charlie connecting a cable to the van, at the top of the shot, you can see the whole of the windscreen is covered. Then the camera cuts back and he is still painting.
Continuity mistake: When the three minis are trying to drive up the ramps onto the coach the shot from outside the cars shows them to be on a two lane road while in the shots from inside the cars they are on a three lane road.
Continuity mistake: When the Minis are practicing jumping, one of them goes tumbling onto its roof, but the other crashes into another car, denting its wing. Just before the impact, you can see that there is already a dent there where it has obviously already done the same stunt.
Continuity mistake: When the three Minis are driving through a steep turn you see that the chasing police bike overtakes on the inside lane. In the next view from inside the following police car there is no bike in front of or beside the Minis. In the following shot from in front of the Minis looking back the bike is beside the police car behind the Minis. (01:18:00 - 01:26:00)
Continuity mistake: When one of the Minis tries to mount the ramp into the coach it has a bit of silver trim behind the front wheel hanging loose. A few seconds later when it tries again the trim is back in place.
Continuity mistake: In the film, when Charlie just comes out of prison, his fringe suddenly moves to a different position.
Continuity mistake: The pile of gold on the coach at the end is far greater than all three minis could carry.
Continuity mistake: The camera on top of the coach shows clear glass in the roof windows but in the long shots they are covered white.
Continuity mistake: When the white mini goes over the cliff edge the rear window is already missing.