Continuity mistake: When Amanda rushes to get onto the bus to the train station, the door being opened is at the front LEFT of the bus (as viewed from the back). On arrival at the station (5 scenes later), the door opens at the front RIGHT of the bus (as viewed from the back), and in the second camera shot, the driver of the bus can be clearly seen sitting where the door Amanda used to board the bus would be, with no door there.
Other mistake: Miss Froy writes her surname in window condensation on the train before she is abducted, where it's supposed to have remained visible for hours, which is dubious in high summer. Then it all of sudden disappears as they go through a tunnel, but why would going through a tunnel cause condensation on inside of train window to all of a sudden disappear?