We used Be Unlimited in our student house last year and can recommend them, the only thing is the router they supplied is rubbish (drop outs and randomly resets itself) so you could do with buying your own decent ADSL one.
We were quite a distance from the exchange, but got a solid 6mb pretty much any time of the day. And there were 5 of us in the house and no issues with throttling or limits. I found service to be pretty good too, and for our package it was £17.50 per month and 3 month notice if you want to cancel (which is good because student house term is Sep-June, and 12 month contracts of many companies means money wasted).