My DD is off in September to a vibrant northern city. We have applied for student finance for a tuition loan and the minimum maintenance grant because of our earnings. Her Dad and I (divorced) plan to split paying the self catering accommodation rent which also includes utilities and insurance but not food, and she will live on the maintenance grant - £4,168 (which over 52 weeks would be £80 per week though I would expect her to get work in holidays and possibly part time during the course). We also pay her mobile phone bill.
I have checked the Save the Student website which says all in the average student spends £770 per month but that includes rent and bills. When you subtract those that comes to about £82 a week for food, travel, social life, books etc.
What are you expecting your DC to live on per week after bill and rent?