The Freeview Guide says this:

Great British Car Journeys
Episode 1
Saturday 12th, October, 8:00pm - 9:00pm
Channel 4

Christopher Timothy and Peter Davison, stars of the classic TV series All Creatures Great and Small, go back to the 1930s to relive the golden age of motoring. In a homecoming for Peter and Chris, as they return to the beautiful Yorkshire countryside and the villages where they filmed All Creatures Great and Small. Travelling their own Herriot trail from Scarborough to the Yorkshire Dales, they uncover the county's rich and often surprising motoring history, catchup with an old friend or two, and take a very special and nostalgic drive along the roads where their friendship began over 40 years ago.

(Series 1 was Scotland, Cornwall and Wales so this is definitely new).

2011 Morgan 4/4
1932 Austin 7 Chummy