I landed in my glider once at Great Ashfield, and had no chance to get PPR first. I contacted the owner, who was very obliging, and I paid a landing fee.
I can’t speak for now, but then the southern part of the runway was OK. There was a fence dividing the southern, landable, part, from the northern part which appeared to now be an industrial estate.
There were a few private owners based there, and a hangar which at least some of them used.
I don’t know how to get hold of the owner now to ask for PPR.
HTH.
Chris N