Audio problem: When Angel is having a go at Danny in the rain after Tim Messenger has been murdered, there is a shot of Danny over Angel's shoulder. In this shot you can see Angel's mouth isn't moving, but we hear him still shouting at Danny.
Audio problem: When SGT Angel is at the train station with his Japanese Piece Lily and is waiting on the bench, we see a British Rail Class 165 leaving, however the speed the train is going at is too slow for the matching traction sounds (the sound of the train going over gaps in the rails). Also the rear of the train does not match a Chiltern Railways 165, it looks as if it has been edited (although the number reads 165007). Later on, we see Angel almost dropping off to sleep and a fast train comes in and blows the horn, the horn sounded does not match the horn that would come from this type of train, it sounds more of what would come from an EMU version (possibly 365 or 465 Networker).
Answer: Just before "Auntie Jackie's sisters' brothers' boy' legs it, Danny is looking at the DVDs in the supermarket and there's a copy of Shaun of the Dead in the bargain bin...albeit the Spanish version! Only £4.99! It was released as "Zombie Party" in Spain but has the same front cover as UK release.