Factual error: They mess up the number of times Tony fired his Desert Eagle quite a lot, especially in the hallway shootout scene. While Boris Avi and the black crew are arguing in the hallway, Tony fires 8 shots through the wall. Desert Eagles (the .50 calibre version, which is shown) CAN hold 8, 7 in the magazine and the 8th in the chamber. But before he fires, he cocks the slide to cock the hammer. If he did that, any bullet that would be in the chamber would be ejected. None is ejected so it must have loaded the first shell in the magazine. Hence the capacity of the gun is 7. He couldn't have fired 8 shots. He then kicks down the door and walks into the hallway, slaps in another magazine and again cocks the slide. Again based on how he loads the gun there can only possibly be 7 shots. He fires 8 at Boris.
Factual error: At the end of the film when Turkish and Tommy are at the spot where the caravan site use to stand, some police officers come and ask them what they are doing. When the police officer shows his badge which is held in a leather wallet, the badge he shows is one of the royal crest and in London a police officer carries a badge with portcullis symbol on.