Looks like no one is gonna get it, so the answer is "The Dewhursts of Ogleby Hall".
Catching Digbys Donkey?
It's from the episode "Wheelies"....And Howard is waiting to speak to Cleggy about renting his front room... ;D
Excellent question,it had me completely stumpedWell, didn't this go well!
The answer was....Chester. As revealed in the episode "It all began with a Volvo Headlamp".
He had one called Stella and one called Taffy. There could have been more though.
Brenda?