Computer Science -
I only know one person who's doing computer science and in all honesty I don't talk to him that much, but he seems to enjoy his course and he's not shut away doing work all the time so I'm guessing it's not too extensive, I'll ask him for you then come back to you with this one, sorry!
Shopping -
There is a shopping centre, which as said is around a 5-10 minute walk away from Campus and can vary dependent on your accommodation, and it has things like tesco, wilkinsons, iceland, etc so you'll easily be able to buy bedding/cutlery and any other essentials.
Accommodation - money -
It depends whether you're looking to be social or not. Bluebell and Sherbourne are obviously newly built and to me Bluebell looks like a really posh hotel, but then it's a common stereotype that Bluebell people tend to keep themselves to themselves and aren't very social. Also, international students are favoured for Bluebell as it's a longer let, so it's easier for internationals to keep their stuff on campus. You also get an en suite and things, but like I said it depends on what kind of person you are.