Hi I used to fly a Baron 55 and then a Crusader 303 twin into Davidstow
It is a disused airfield with broken up and stoney runways.
We found one side of one runway which was in good condition giving 500 meters which was acceptable and plenty of none acceptable run off areas but good if you got it wrong in an emergency.
There was a microlight club based there in a shed and not much more.
watch out for low cloud which often meant a diversion into Exeter and check the runways for animals as there can often be livestock wandering around as well as Cornish Carrot crunchers moaning about aircraft.
This was a few years ago so do not know the situation there now but I used to fly a company in there every week for the best part of a year
Pace