(1948, Cecil Parker, Ursula Jeans)
Two buses appear. One is apparently in wartime Southdown livery, but as it takes on passengers it's revealed as London Transport ST821 (GK3192), which was a green ST new in 1931 to National Omnibus; it's now preserved:
Also seen is a genuine Southdown 'decker, registration UF5755 - can anyone identify?
(thanks Colin Read)