True Unlimited Broadband in the UK?

Tango42 asks: "Next (academic) year, I'm going to be living in a student house with 4 (inc. me) heavy internet users. I can see us potentially using 50-100GB/month. Do you know any UK ISP that will accept that kind of usage without claiming it's abuse under some 'acceptable use policy'? We're willing to pay a bit more that we would on more restrictive ISPs, as it's divided 4 ways, we just don't want to end up getting cut off or throttled for going over the limit on an 'unlimited' account."