Manfred Mann - Paul Jones (I thought this was the easiest!)
Shirehorses - Mark Radcliffe
Salvation Air Force - Stuart Maconie, but you'd probably have had to read 'Cider With Roadies' to know that. I reckoned anyone paying attention to the Reading Books thread might have had a clue, or worked it out from the others.
Squeeze - Jools Holland
and, occasionally, a Fun Lovin' Criminal? - Huey Morgan
I thought the last one would put people off the scent, cause he's usually heard by about three people over on 6Music, but he has been sitting in very genially for Dermot, so I threw him in.
Actually, I thought there were more members of bands DJing on R2, but most of them (Michael Ball, Mike Harding, Suzi Quatro, Elaine Page, and even Jimmy Young and Pete Murray) were artists under their own names.
Meanwhile, the answer to your question is I don't know, but you weren't round ours.
* I also have The Doors of Perception/Heaven & Hell, oddly enough, though very little Blake