(1972, James Booth, Richard Briers, Julie Ege et al)

Another dire British 'comedy' includes footage of several buses from the London Country fleet.
The first AEC RF we see is a distant Green Line-liveried bus:

…but then we see RF149 (MLL536) on Green Line route 706 being jostled in traffic:

The same sequence includes several London Country RTs:

Later there's the rear of an AEC Swift in the later pre-NBC livery: