Keep the Aspidistra Flying AKA A Merry War
(1997, Richard E Grant, Helena Bonham Carter)
Set in 1930s London, but has some nice footage of South Yorkshire 61 (GWT630), a 1947 Albion Valkyrie CX13 with Burlingham coachwork:
As Grant and Bonham Carter disembark the bus pulls away, and it can be seen that the South Yorkshire fleetname on the side has been covered over for filming:
