I believe this is the approach to "Titfield" station (actually Monkton Combe station in the village of that name) in the film "The Titfield Thunderbolt" made in 1952 by Ealing Studios. The line was the Limpley Stoke - Camerton line, near Bath, which had closed to freight track in 1950 and passenger traffic before then.
Regards,
John Webb