A Severed Head (1971, Lee Remick, Richard Attenborough et al)

Odd comedy based on an Iris Murdoch novel and partly set in Oxford. Night scenes include several City of Oxford Motor Services buses, including 373 (KFC373G), a 1968 Daimler Fleetline with Northern Counties body:
Even less well seen are this AEC Renown and, rarer, one of the first batch of Oxford's AEC Bridgemasters: