Factual error: The film is set in 1987 but most of the street lights seen throughout the movie are LED street lights and some high pressure sodium Philips lanterns (produced from the early 1990s to early 2000s), neither of which were around back then. Similarly many of the shots of the M1 motorway show modern cars and smart motorway/variable speed limits, which never existed at the time.
Continuity mistake: Javed and his father are in the car and they need Javed's mother and sisters to help push the car to get it started. There is an ornament that looks like a traffic light hanging from the rear view mirror in the car, which can be seen in exterior shots of the car, but disappears when we are looking through the windscreen from inside the car. In the next scene after the car has successfully started, the rear view mirror ornament vanishes altogether.Jedd Jong
Factual error: The M1 motorway shown several times is actually the M40, also there can be seen a modern mobile phone mast in these shots.