Of course the only way to get broadband in the UK is via Telewest and occasionally NTL.
Telewest has served me very well for the last 3-4 years + they just increased the download speed to 1Mb (from 750k) for the same price (£25/month) [with no bandwidth limitations].
Peeps on 3Mb now get 4Mb - can't get that on BT et al.
I tend to recommend plus.net for ADSL. I've done 6 or 7 installs using them so far with no complaints and excellent support from them. Their website even tells you how many calls they have waiting or how it takes them on average to fix problems.
Charles