The most obvious one to date is where the Fire Tenders were kept, the Bellmans are still there but one has been “extended” in length.
Biggest loss to date was the Ops Board (which was painted onto a wall and still held chalk written info on it), well, its still there but it has been painted over.
Best kept secret at Drem is the wonderful old mural dating from WW1 which the present owners of the building (used for making Jams etc), painted round.
Suggest you type in “RAF Drem” where there is a web site and it has present day pictures of what is still there.