The train was portrayed by 4 locomotives 2980 Coeur de Lion, 5004 Llanstephan Castle, 4953 Pitchford Hall and 6005 King George II.
The film could allow viewers to fear that the only way to stop a runaway steam train is for a psychotherapist to climb over the tender to talk to the driver.
In fact, catch points are fitted on railways to stop runaway trains by diverting them into ballast. This was demonstrated by the more accurate plot in Thomas the Tank Engine when the boy who lit the fire played with the regulator, and Thomas couldn't stop himself from breaking through his engine shed doors, but a catch point stopped him from getting onto the main line.
Video from a restored and remastered version by the BBC from National Film and Television Archive [uk] materials.
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