Corrected entry: There was blood covering the floor by the main entrance to the station, from where Creep dragged Mandy's body into the underground. People were entering the station the next morning as normal, however, the station would have been closed if the entrance was covered in blood.
Corrected entry: After boarding the tube the lights go out in the carriages. She walks through the train until she comes across Guy with the torch. After a bit of suspense he flicks a lever in the carriage and the lights come back on. There aren't light controls on London Underground trains, and in fact the lever he pulls is an emergency alarm.
Corrected entry: Katie gets back onto the Charing Cross platform after her night of terror and people are arriving for the first tube. But there had been two murders on the platform hours earlier, surely they would have closed the station and what happened to Guy's body, that was left on platform?
Corrected entry: When Katie is standing in front of the ticket machine, and her twenty pound note won't be accepted the woman behind her says that the machine doesn't accept notes - When Katie turns around you can see on top of the machine flashing "Notes accepted".