Factual error: In the basement scene where the blind man is shooting at the home invaders with the M9 Beretta, the weapon should lock with the chamber open once the last round is fired. Instead the slide goes forwards, allowing the blind man to continue pulling the trigger.
Factual error: No council house in Enfield has a cellar like that.
Factual error: The license plate of the car that takes the protagonist to the sanitarium is GR 36E46. That's not a valid Swiss plate: GR indicates the canton of Graubünden, but other than that it is supposed to have only digits and no letters.
Factual error: The boy cuts through the tree lights with metal scissors to free the girl but doesn't get electrocuted. (01:13:30)
Factual error: I'm not 100% on the make of the bolt action rifle Lee is carrying but I know it contains an internal magazine of maximum 5 bullets. She opens the bolt, and no empty shell casing flies out, and for some unknown and stupid reason loads only one round into the chamber. Single shot bolt action rifles are usually very antiquated and hers isn't, or they are very large anti-material rifles with huge calibers of .50 BMG like the Steyr. (01:13:00)
Factual error: The girls are looking through a rather wide gap between the door and the door-sill. If a gap were that wide the door lock would not be very secure, and just a little force would open it. (00:19:25)
Factual error: The nearest tube station to Wembley Stadium is Wembley Park or Wembley Central and not Park Royal at all.
Factual error: Tommy states that Jimson Weed is a paralytic, but it is not known to have this property. It is however a powerful hallucinogen and deliriant.
Factual error: A bullhorn can be heard in the background off-screen during a battle with the zombies, even though the movie takes place during Victorian times. (01:19:30)
Factual error: Toward the end of the movie, we see a B-2 Spirit releasing bombs over the town. This is very unlikely, as this is probably the most expensive aircraft to operate in the USAF arsenal, and it has only 20 of them. There is no reason to use it over an area with no hostile enemy fire, when much cheaper and more available aircraft can to the same task.
Factual error: The open credit sequence takes place at the Atlanta Airport (Hartsfield Jackson), signs are throughout the Delta terminals, Boston Airport announcements are dubbed in until we see John Cusack come off the airplane.
Factual error: Deputy Winston introduces herself and says she's with the Bunyan County Sheriff's Department. Her cruiser is mislabeled with Ackamas County Sheriff markings. (00:57:00)