TV's Naughtiest Blunders (ITV comedy clip show, 2000-5)

Graeme Selway notes Chester's Dennis Dart/Plaxton 55 (J155EDM) in the third compilation in the series. "Presumably, therefore, the bus has featured in another TV show, from which the TNB3 clip was taken from. Unfortunately, I haven't the foggiest as to what it might be!" Nor have I - help!!!?