Filmed in Bristol and opens with passing Bristol Omnibus buses. These are Bristol KSWs:
Bristol Omnibus LC8479 (819CHU), a 1958 LD6B/Eastern Coachworks:
Inside the bus station several Bristol Lodekkas are seen passing through (this is one), and behind them a Bristol L:
A scene in which a girl boards Bristol C8154 and departs:
There may well be more - these are taken from a Youtube clip!