English Heritage visited the site a week or so ago & examined the 3 combined RFC aeroplane sheds & the two small adjacent hangars (currently used by the Air Ambulance & to store airfield vehicles). Rumour is that they have been / will be listed & will form the nucleus of a Bristol themed aircraft museum (not holding my breath, but the location could be a winner if it ever went ahead) which will incorporate the decaying Concorde. If you’ve ever wondered what those aeroplane sheds look like inside, they’re the same as the ones at Duxford (just not so well maintained).
As ever, various rumours persist regarding potential buyers of the site who may continue to use it as an airfield, but the generally accepted view is that flying will cease next December. How long it takes for redevelopment to begin is anyones guess. I foresee several years of stagnation & decay before the site bulldozed & covered in “social housing”.