(1972, Dick Emery et al)

The film is pretty awful too. The title immortalises one of comedian Dick Emery's phrases; a very popular comedian in his day, but the characters from his TV sketches don't translate well to the big screen.
A scene at London Heathrow Airport includes this Bedford YRQ/Duple……

….before panning out to reveal two BEA AEC Routemasters, what appears to be a Duple Midland-bodied Bedford VAS, and a distant Weymann bodied coach:

The following scene sees a Duple coach pull out from behind a Plaxton bodied Leyland Leopard (?), but neither is clearly seen:

A back-projected scene ostensibly in Italy features two similar minicoaches: