BBC Schools geography strand.
Episode: What is a Street (1976)
Shot in Northampton, with a brief interlude in Finchingfield, Essex.
These YouTube screencaps are not clear enough to give more than an impression, but beyond an establishing shot of London Transport AEC Routemasters.....
......we see Northampton Transport's fleet at work, Leyland-Nationals, Willowbrook bodied Daimler Fleetline saloons, and the long-lived Roe bodied
Daimler CVG6s:
Also glimpsed is a United Counties Bristol Lodekka, and in Finchingfield an Eastern Counties Bristol MW: