(1954, Alistair Sim, Joyce Grenfell, George Cole)

Opens with the schoolgirls disembarking from London Transport T609 (EYK244) a 10T10 AEC Regal/Weymann coach, and from the windows (!) of another vehicle seen only in one shot:

A visiting sports team arrives in rare Maudsley Marathon/Santos HOC164 (thanks Bob Wingrove and Colin Read):