Try here...
http://busesonscreen.net/screen1/ind...ntv.tvm.marple
Episode: Nemesis
Miss Marple takes a coach tour on the distinctive dorsal-finned Scarlet Coaches 1950 Leyland Comet CPP1/Harrington MYA590. Bob Wingrove observes the coach "was painted in a blue/cream livery for the film work, as apparently the BBC liked the look of the coach but thought that the red livery looked too much like a London bus.". The (fictional) fleetname is 'Historic Homes and Gardens', and there are a number of interior and exterior shots:
Tim