À Coeur Joie AKA Two Weeks in September
(1967, Brigitte Bardot)
Bardot plays a woman torn between two men. In part of the movie she comes to London, and there's a cameo role for London Transport Leyland RTL285 (KGU231):
A shame we don't see more of this Ford 570E/Duple:
A 1964 AEC Routemaster from the ALDxxxB batch, and another in traffic:
