(1968, Joachim Fuchsberger, Siw Mattson)

West German movie set in the UK, with scenes in London.
Establishing shots at Piccadilly Circus include London Transport AEC Routemasters and RTs:

Later in the movie there is a curious continuity issue. Woman waits for a bus. Stretched Routemaster RML2566 (JJD566D) arrives on route 6A:

Standard RM1707 (707DYE) pulls in on route 9. Meantime another standard, RM142 (WLT142) arrives behind RM1707 as she's boarding it:

Cut to the man she was talking to, then she's seen leaving, standing on the platform of……RML2522 (JJD522D) on route 6A!: