As I'm unable to post photos, here's a different slant.
The first series of 'Doc Martin' is being re-shown on saturday afternoons. Last saturday's episode had the Doc and the local plod driving across what was clearly an airfield, probably disused. As just about all the filming was done in the west country, I have tried to identify which airfield this might be.
The initial choices were Predannack, Perranporth or Portreath but looking further afield, I reckon it was more likely to be Davidstow Moor based on the narrow public road across the airfield and the wooded area on one side.
Can anyone conform this?