At the beginning of the film Luke Williams is seen aboard a loco hauled train. The shots of the train on the journey alternate between this train and an Inter City 125.
The train arrives into London Marylebone station - which at the time saw neither InterCity 125s (HSTs) nor locomotive-hauled trains. In fact, the only trains going into and out of Marylebone was a DMU (diesel multiple unit) service to Aylesbury and other destinations in Buckinghamshire (although Marylebone now sees, at the time of writing, a regular service by Chiltern Railways to Birmingham and Warwickshire).