The Likely Lads (1976, James Bolam, Rodney Bewes)

Opens with a distant shot of a Northern General singledecker. More identifiable is a Daimler Fleetline from the same company with Alexander W body seen from behind:
As Terry Collier (James Bolam) drives his Bedford van, a Tyne and Wear PTE Leyland Atlantean/Alexander passes; in the next shot it's metamorphosed into a Northern General Atlantean/Park Royal:
A Northern General AEC Renown/Park Royal (ex East Yorkshire) passes on the dual carriageway when we see an outside shot of Terry's block of flats:
Also glimpsed on the Tyne Bridge are two more Northern General buses, a Leyland-National and an unidentified red doubledecker.
This Atlantean/Alexander creeps into another shot of Terry's van:
In the next shot Bob Ferris (Rodney Bewes) has a bunch of flowers jammed in the entrance doors of Tyne and Wear PTE 678, a Scania Metropolitan/MCW:
(thanks Jon Price, Alan Sinclair and Chris Hough)