There is a link in the BBC article to the British Council website and the list of downloadable films.
Of the ones Ive seen I recommend London's River from 1940 with some great footage from Billingsgate
Chris
The film "London 1942" is definitely worth a look
Title
The Man on the Beat
Director
Roger MacDougall
Year
1945
About the film
The training and principles of police officers, their duties whilst on the beat, and their role within the community.
Title
English Criminal Justice
Director
Ken Annakin
Year
1946
About the film
Dramatically told, English Criminal Justice takes us on a journey through the principles and procedures of the various courts of law in Britain.
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