Dean Sullivan advises that the two buses seen in this late 2003 advert filmed near Newbury are Sullivan Buses AEC Routemaster RM1069 (69CLT) and (behind a hedge) Leyland Titan T85 (CUL85V). "1069 can be seen from the rear showing Piccadilly Circus. They also wanted to show route 19. I spent a hour rummaging through my collection to get a full rear set and none of it was used. A freshly repainted T85 can be seen parked behind a hedge (I assume it was to block something). No reason for the bus other than that."
In the same week as this was filmed, RM1069 spent two days filming with Eastenders.