The film producers went to a lot of effort to create an authentic First World War troop train by hiring the Bluebell Railway’s C Class engine and a number of pre-WW2 coaches to portray the train at Victoria station. Realising that Victoria station had been rebuilt in more recent times they even substituted King’s Cross station for Victoria as it looks more as Victoria did back then. The whole assemby was moved up there and back by rail in February / March this year.
So it’s a shame that things like the dynamic modelling of aircraft doesn’t match some of those values, but it is a short clip and of course the film is sci-fi inserted into an actual period in history.
Regards,
Dan