The Diceman (Discovery Channel travel documentary, 1998-2002)

"A travel documentary with Russell and his cameraman Sean touring Britain with destinations decided by the throw of a dice.
In series 1 episode 3 they are on the Isle of Arran and leave Brodick heading to the North of the island on an open top Alexander bodied Leyland Leopard which I am fairly sure was Stagecoach Western Buses OSJ636R. They both complained about the rough ride (it was a Leopard then!)."
(thanks Malcolm Rennie)