Never Let Go
(1960, Richard Todd, Peter Sellers, Elizabeth Sellars)
Todd jumps off two buses in different scenes. The first is Tilling 6300 (GW6300), a 1932 AEC Regent rebodied by Eastern Coachworks in 1944:
The second is London Transport Leyland RTL721 (KXW71):
He crosses the road between two AEC RTs, one unidentifiable, the second RT4085 (LUC434):
This scene is evidently on a trolleybus route: