British Telecom
An advertisement for broadband featured a Hong Kong tram.
A September 2002 advert for BT's then patchily available broadband service included a glimpse of a parked white/grey Plaxton bodied coach. A second advert showed a (CGI) rhinoceros landing on a car and ramming the coach (an interior shot showing startled schoolchildren) leaving dents in the side. (thanks Stephen Osman)
Deregulation of telephone directory enquiries in the UK brought some utterly idiotic adverts to British television. Belatedly BT got in on the act, and their ad had two Stagecoach saloons, one an Alexander ALX-bodied vehicle in the livery current in 2003, the other probably a Plaxton Pointer-bodied step-entrance Dennis Dart in the original Stagecoach livery.
A 2010 entry in a series of ads about a dysfunctional family featured a Go Ahead singledecker: