I stand corrected; someone told me when we were starting LARS North that the Luton AR15 couldn't be used (would have been perfect) but they thought it was ex-RAF. Couldn't have been RB could it?
I know the Dunsfold one was ex Brize, (maybe that's where I'm getting confused) There was some sort of 'scandal' about it too; apparently bits were 'missing' when the packing cases were opened at Dunsfold and they had been there when it was packed at Brize.