I saw Flying Scot on Talking Pictures yesterday, I agree that the "feature locomotive" was indeed a Castle Class. I wondered though if the film was used as a blueprint for the real Great Train Robbery. The principle being that a large amount of money was being conveyed by train and that the best way to get the money of the train was to drop it off a bridge. Far fetched I know but did somebody get inspiration from the film. Finally I believe the train terminated at Paddington, does anybody agree with this. Railfan