 The various screens and displays, seen mostly in the backgrounds,  are actually TV screens with a video running. The film was shot in  the UK where televisions run at 25 frames per second, however, film  is normally shot and projected at 24 frames per second! Filming the  TV monitors at that speed would cause the TV screens to run out of  sync with the film, so they would have flickered terribly. Instead,  the shots containing the monitors were taken at 25 frames per second  to keep the monitors in sync, so when these are then projected at  the standard rate of 24 fps, they now run a bit slower than  real