Quietly, DS is paying £170 a week for a shared Zone 1 flat, though with bills on top. It means though that he saves both time and money from not having to commute, plus it is easy to join in with everything, so I think it is worth it, and they do a lot of cooking together. Friends in another flat are saving money by sharing rooms, something we used to have to do in halls when I was a student. Perhaps part of it is that expectations have increased. My hall used to have triple and one quadrupal rooms.