Sorting out your own flat you'd probably pay £300-£330 a month. Uni accomedation costs are
here. I think about £320 a month will be the cheapest for that you get a cupboard of a room where as finding your own you'll get a nice big old tenament room. But assuming it hasn't changed with uni flats you get internet and bills included so it's not a rip off really
I have pretty much no money so you can probably consider this as cheap as you can get. My gas and electric are £10 a month (I'm good at finding a deal), my internet is £6, my phone is £5.
I spend £10-20 per week on shopping. I eat a lot and I eat healthy but I cook from scratch (I'm the sort of person who bakes their own beans because it's cheaper). That includes toiletries.
Study costs will vary by course. First and second year tend to have more required textbooks- as a social science student I'd say 4-6 per year at £10-35 each depending on if you can get older editions. I've never had any other course costs apart from printing things out and pens and paper.
I rarely buy clothes unless what I have has fallen apart. I've probably spent less than £100 a year on clothes for the last four years. My mum has always gotten me some clothes for birthdays and Christmas so I have a few nicer pairs of jeans and shirts and stuff.
In first year I went out and drank quite a bit, but I had more money then. About £30 a week on doing out- drink and some pub food. Now I don't go out much. I'd spend £5-10 a week on getting coffees or buying some beer to go to a mates or going to the cinema.
I need to get the bus for work but most students rarely get the bus. It's £3.50 for a day ticket (£1.40 single to go anywhere) and I get two a week.
ETA: my one other expense is gym membership, £100 from August 2011 to August 2012 at the uni gym