Obviously you'll need clothes and kitchen stuff like plates, cutlery, dish cloth etc.
Some little things you might have overlooked are: bottle opener and tin opener, some kind of collapsible laundry basket (being a student is no excuse for your room being covered in dirty laundry), I also advise taking some food with you for the first week to save you going to do a food shop 2 days into Freshers Week.
Make sure you take some form of ID with you; driving licence/passport and your national insurance no. as you'll need these if you intend to apply for part-time jobs while you're at uni.