Factual error: During the car chase scene with the Mustang, the driver of the Mustang repeatedly shifts his automatic transmission from "drive" to L1. Also, one shot during the chase shows that driver's feet using a clutch to shift his automatic.
Factual error: The route to Tower Bridge is completely wrong - there are no duel carriageways approaching the bridge from the Tower of London side of the Thames, it's all single roads in that area.
Factual error: All the couples on the train are modern and not correct for the period. Trackwork back then wasn't very good, considering the speed that the back end of the train is going it probably would have derailed long before it did. The caboose and the rest of the train seen to be just shunted off the track for the dramatic crash, realistically it would have flipped over and gone over the trestle.
Factual error: The movie is set during the Great Depression, in 1933, but Charles Bronson gets in town aboard of a freight train pulled by an EMD NW5 diesel locomotor, introduced over a decade later. (00:01:15)