Episode 3.01: Backwards
Scenes in Manchester in this 1989 episode include Greater Manchester Daimler Fleetlines/Leyland Atlanteans, all seen backwards.
Also seen, though are a blue midibus (can anyone identify?) and Greater Manchester 1761 (C761YBA), a 1985 Dennis Domino with Northern Counties body:
Episode 9.02: Back To Earth part 2
The 2009 three part return of this much loved show showed Lister, Rimmer, Kryten and Cat riding a Dennis Trident/Plaxton President.
It's red, but we see very little of it!