Like Headtime, I spent ages looking for this one... Here it is...
The New Statesman (no relation to Alan B,Astard - Rik Mayall)
BBC2 1984-85 Pilot: 3 December 84
September - 17 October 85 Thursdays 9.00pm
Writer: Douglas Watkinson / Producer/Director: David Askey
Sitcom. George Vance, a Welshman running a museum in England, inherits an Earldom and finds himself taking a seat in the house of Lords. The two lead characters were played by Colin Blakely and Gwen Taylor in the pilot but Windsor Davies finally took on the role in the Series.