Of course we should remember NOT to tar all ex-RAF types with the same brush as some previous posters have done. I remember an ex-RAF Sqn Ldr Herc jockey who joined Flybe on the Q400 fleet as an F/O, and he was an absolute pleasure to fly with; he was fully aware of his duties and position in the flightdeck chain of command. He did occasionally look like a Sqn CO as he went about his pre and post-flight tasks in the crewroom, but never (that I saw) used his former position to bully, initimidate or apply undue influence over his colleagues.
Come to think of it, exactly the same can be said of a former Engineering Sqn Ldr who I also flew with on the Q400.
In this particular case I know the Captain and flew with him when he was an F/O, but I don't know the F/O so can't really comment.