South Riding (Yorkshire TV serial, 1974)

Chris Hough drew my attention to the appearance of Bradford 325 (KW2260), a 1927 all-Leyland Lion PLSC3: "This YTV serial starring Dorothy Tutin and Fiona Fullerton had a shot of a PLSC type Leyland Lion in the livery of East Yorkshire Motor Services in one episode. This vehicle was later resident at the West Yorkshire Transport Museum in Bradford." These screencaps come from a Youtube clip of the opening of episode 1; I can't say if the bus appears more clearly than shown here, but note the 'South Riding' fleetname: