Factual error: The British schoolroom has a UK flag at the front. American schools might do that; UK schools don't. There's even a little one on the teacher's desk.
Factual error: The phone in the manor kitchen uses a single ring common to North American phones, not the double ring used in Britain.
Factual error: In the first part of the story-telling the main character appears to be in front of a wrist-watch store's window. That store is Richard Mille, a brand that only started making watches in 1999, the story is set in 1987. (00:06:05)
Continuity mistake: Hannah's outfits don't match when she follows Miles into the Chappelle after she finds him smoking. She goes in wearing red and once she enters they show her wearing green. (00:24:16)