Genevieve
(1953, John Gregson, Dinah Sheridan, Kay Kendall, Kenneth More)
This film about a race from Brighton to London between two participants in the London to Brighton run features a number of buses. Bob Wingrove notes the following London Transport types: AEC Regent III RT both pre war and post war; RTL class Leyland PD2; STL class AEC Regent; RF class AEC Regal IV; both green and red T class AEC Regals.
The only clearly seen T is T765 (HGF855), seen from behind:
Colin Read notes STL1127 (CLE12) on route 182:
Bob also notes a Southdown Leyland Royal Tiger/East Lancashire and Brighton Hove and District Bristol Ks near the seafront in Brighton. However, a note from John points out there are trolleybus poles visible on one of the Brighton buses, and on closer inspection I agree, they're trolleybuses:
“There was a Leyland PS1 with what looked as if it could have been a Duple body and also what I think was a Bedford SB/Duple.” The film is well worth seeing, especially for the last half hour, largely shot in South East London.