Factual error: When Nancy goes in a car in London to score drugs there is a political poster stating 'Labour Isn't Working'. This poster was used by the Conservative party in the 1979 general election - Nancy was killed 9 months prior to this election.
Factual error: In the scene when Walter was in the den in the middle of the floor, Anna lifts up part of the blanket and he falls through to the first floor. However, in the next scene, he appears to be able to walk without any problem. The second floor was at least 20-30 feet above the first floor and was covered with all sorts of rubble and a wooden floor. If he had fallen that far, he would have been badly injured and would not have been able to just walk like he did.