(BBC children's fantasy series, 1992)

Highly-rated but little-known show has this Plaxton coach in Episode 1, but you see no more than this:

The real fun starts in Episode 5, when the bad guy in a refuse truck chases the good guy in a Bristol VRTSL3/Eastern Coachworks. The VR in question is Wilts and Dorset 3457 (NUM340V), one of a number of second-hand VRs that operated for Wilts and Dorset. NUM340V was new in 1980 as West Yorkshire 1749, later becoming Keighley-West Yorkshire 1749 in 1989. It moved to Wilts and Dorset circa 1991. Note that it has 'Private' wound up on the destination display, so it's not actually in service.

As a bonus we see one of Wilts and Dorset's extensive fleet of MCW Metroriders:

The Metrorider seen in the distance could be the same vehicle; it may be just a quirk of filming: