Three really excellent film productions made about the Royal Air Force covering the period from 1912 to 1980 are tucked away in a quiet corner of youtube.
I have posted the link for the last one covering the period from 1946 to 1980.
This production includes brilliant footage -- on a personal note -- it even includes film of a Single Engine Pioneer flying in Malaya in the 1950's. Footage, that until I found the link, I had never seen before.
This (third and last in the series of three) production provides not only rare contemporaneous footage of the evolvement of the Service during the period 1946 - 1980, but a commentary which attempts to rationalise the changes.
https://www.youtube.com/watch?v=DgtEIJQxAHw