Dark H
You're quite right about Rosie. He was very much like a dog, bark's much worse etc; when he wasn't growling at you he'd be asleep in the sun outside Block 110. Whilst on Fitters course in '83 remember getting a good growling at about long hair, despite having less hair than Bruce Willis, when I explained I was strapped for cash Rosie barked "Get off my parade square and get down to the barber's", (remember it at the side of the guard room?) Rosie doubled me down there, although he was some way behind I could quite clearly understand what he was saying. Once there, Rosie enters with me, takes his cap off and says "I'll pay for this one, he'll settle up later" Behind all that bullsh1t there really was a decent fella.
I think he had a side-kick/bag carrier name of Jez something.