Any Man's Kingdom (1956, British Transport Films documentary)

Shot in the North East of England, and has some nice views of the local buses, including United Automobile LTO227, a 1946 Leyland Tiger TS7 with Willowbrook body:
These United buses are packed too close to identify:
However, this is a United 1939 Leyland Tiger TS8/Willowbrook:
...and this 1942 Bristol L5G/Burlingham, GHN179, was new to United but by the time it was filmed was in use with Fox of Falstone as a one person operated bus: