I understand that Kemble airfield is owned by two brothers who do not get on. Hence the dividing fence and lack of access from the North side to the South. I can imagine that it is one of the owners who is looking at development.
I learned this when I flew in to visit the Bristol Aircraft Museum which is on the South side. I had hoped that I could taxi across to the Museum but, disappointingly, I discovered that you couldn't even drive across. Fortunately, a kind volunteer from the excellent Museum drove around to pick us up.