Finally got round to watching the 1st episode of this outstanding 2 part BBC4 series on British jet aircraft. In the first episode there are occasional very high quality colour 35mm 'stock shots' of the City in what is supposed to be the early 50's - I guess some artistic licence has been used and the film is probably v early 60's or late 50's?. Some of the shots show the exterior of Cannon St, an EMU heading towards Holborn Viaduct (with a Scammel Dray on the street below!) & a shot of a London Terminus. Its this one I can't work out- no sign of any steam,overall roof, signs for Platforms 14 & 15 , some sort of suburban EMU at the stops and on the far left a Midland region (?) set of red carriages/EMU. I am guessing Broad St or Liverpool St? & if anyone knows what source material this bit of very high quality colour film comes from originally I would love to know.