The Saint (Celtic Films thriller series, 1989) Not the classic Roger Moore Saint, but a set of six TV movies starring Simon Dutton and produced in Australia.

Episode 3: The Software Murders:
Features an Optare City Pacer bringing delegates to a conference. The legal lettering is visible but not legible:

Also partly seen is a Plaxton Supreme IV coach:

…and a London Buses MCW Metrobus in background:

The City Pacer again:

Episode 4: The Blue Dulac:

The Saint travels incognito on this Mercedes O.302 of Cars Carpentier: