(1973, Jack Smethurst, Rudolph Walker)

The film of the TV sitcom was made by Hammer, and it's embarrassingly bad. Eddie (white bloke) and Bill (black bloke) are catching the bus to work. It's crowded, and Bill gets on, but Eddie doesn't. The bus used is AEC RT935 (JXN325), which had been sold out of London Transport service by the time this was filmed. The rear destination blind shows this bus is not in London Transport service.

Eddie is forced to catch the next bus, but gets involved in an argument with the conductor and gets thrown off that bus as well. It's RT935 again, but the filmmakers have applied a fake registration to it to pretend it's different:
There is an RT seen still in service with London Transport; it's this one, registration HLXxxx: