(1970, Jane Birkin, Alessio Orano, John Steiner)
An Italian movie shot in Oxford in summer 1969, and with occasional views of the fabled tricoloured City of Oxford Motor Services livery. Seen in the High, an AEC Renown or Bridgemaster heads away from the camera, but there is a better (and uncommon) view of Bridgemaster 311 (311MFC):

In St Aldates a 1958 AEC Regent V/Park Royal pauses, while two more Regent Vs approach Magdalen Bridge, one from either side: