I was quite lucky. When I was doing my training I stayed in the Florence Nightingale nurses home in Edinburgh, basically a room with shared toilets, etc. There were loads of us was probably not dissimilar to Uni halls.
When I qualified it was 3 bedroom flats whereby you had your own room, shared living room, kitchen and bathroom. They were actually not too bad as you put all your own stuff in them and could make them quite homely. If you get good flatmates then at times you are never in