I agree about the pressure/panic to sort next year's houses early, and it's good to be able to feel it is sorted and they can relax.
That said, DD1 Edinburgh, went through the same her first year for year 2 accommodation.
Year 3 she was in Canada and did some travelling on the way home. Not back til July and borrowing a friend's place in August to work the fringe. I have been worrying about her final year accommodation all year but she had two friends who also had the year abroad and they sorted it after they came back at the end of July. Good flat in a great location.
So I think it's a bit like panic buying. Places keep coming up all year. Try to stay cool is my advice.