The film was shot with co-operation of the
London and North Eastern Railway company, who allocated their flagship
Class A1 locomotive, the eponymous 4472
Flying Scotsman along with use of the
Hertford Loop Line for filming. This locomotive was extensively used by the LNER for promotional purposes, having been a star of the 1924
British Empire Exhibition and breaking a number of speed records. At the time of its appearance in this film, the locomotive is technically an A1 (only being rebuilt and classified "A3" in 1947). The locomotive is the only member of its class to have been preserved. All of the stunts were filmed on the moving locomotive with the actors. Most dangerously, at one point actress Pauline Johnson walks along the edge of the moving train wearing high heeled shoes, transferring from the coaches to the locomotive while travelling at speed. Allegedly Sir
Nigel Gresley, chief engineer of the LNER, was so concerned at the unsafe practices shown in the film, such as the decoupling of the locomotive from the train while in motion, he insisted that a disclaimer was placed in the opening credits explaining that such things could not happen on the LNER. The notice stated "For the purposes of the film, dramatic licence has been taken in regard to the safety equipment used on The Flying Scotsman". Film historian
John Huntley claimed that Gresley subsequently forbade any further filming on the LNER. It is unclear whether it was initially released with sound, with some film historians such as
John Huntley claiming it predates
Blackmail to be the earliest British sound film. The BFI film database claims that the soundtrack was added in March 1930. ==References==