The BBC I think got the imagery from Keele Uni. who in turn received the films from us at the RAF Archive(over 60,000 tins of film), Keele was going to put all this information onto the web, the only problem was that their web site crash and has not been up for the pass 6 months.
I was luckly and found a number of films and then scanned them (with the OK from my Boss).
Under the public records act. the RAF Archive had to release all of its imagery that was over 30 years old, (all items before 1974). And as there was over 120,000 tins of film and prints in the archive, it was one hell of a job.
Where the military can throw manpower to a task like this, Keele could not, at one time I had over 30 RAF / WRAF personnel working for me, Keele had 2!.
So in the long run, the general public may never see any of this excellent imagery.