Sure that it wasn't just the "Board Flat" which is a room on the Third Floor. There are two actual flats (living room, Kitchen, bathroom, two beds) literally on the roof of the building. In my day, nobody at the QM (not even Michael the porter
) had access to them.
It's now just the 'board lounge' - a room with a sofa and a telly, although they'll be doing a little bit of building work at some point this summer, which will, amongst other things, extend the shop, move the staffroom upstairs, and remove the snooker room. (Because why would you want to play snooker there, when there's the GUU's snooker hall)
red_kola's right - there are two flats on top of the building, accessable by the fire escape round the back of the building. I think the QM 'own' them (in as much as they 'own' the building - it's actually Uni property), but then lease the flats back to the accommodation service.
As for flats in town - Fleming House, corner of Cambridge Street/Renfrew Street is gradually being transformed into posh houses with nice views.