Forgive my intrusion to this thread, but something has crossed my mind that may be pertinent to the discussion.
I was stationed at Scampton when Sgt Inman ejected from a Red Arrows Hawk (XX227?) during a transit flight from Macrihanish to Kinloss. ISTR, during a discussion with a member of the Red's 2nd line team not long after the incident, the question was asked why the pilot wasn't also ejected when Sgt Inman left the aircraft and he replied that the Red Arrows aircraft differed from the rest of the Hawks in the fleet in that the command ejection was initiated from the front seat.