Other mistake: When the Mafia are having a dinner party, the film cuts to Charlie Croker throwing his bicycle into the substation to cause a powercut. After the big explosion, the camera switches back to the dinner party and then all the lights go out. But before the lights go out, if you look at the end of the dinner table, there is a doorway, and you can see smoke coming from the candles which have already been lit before the lights go out. Within seconds of the power cut, these candles are brought in from doorway and another set comes in from the left-hand side. A little premature.
Other mistake: When the film about planning the job is being shown to Mr. Bridger in the prison: at the end of the film the mafia man walks right up to the camera to watch the English guy walk off. This seems a bit odd, him being able to walk right up to the camera and the camera operator still filming. Wouldn't he have wanted to keep the fact that he was watching them all the time a secret and not give the game away that the mafia were on to them?