.Net: ISP and Web Hosts Forum: Discussions on hosting companies and internet service providers.
Broadband 4 Britain: Campaign for broadband internet access throughout Britain, features news and a discussion area.
BroadbandBanter.com: Discussions of broadband internet access including cable, VoIP, ISDN and satellite access.
BT Openwoe: A BT Openworld users forum, with news, hints and complaints on BT Openworld's service.
Cable Forum: Discussion forum for ntl and Telewest cable services.
Ciao.com: ISPs: Consumer ranking and reviews of UK ISPs.
Epinions.com: United Kingdom ISPs: Reviews and ratings of a number of the more popular UK ISPs.
Freedom2Support: ISP Freedom2Surf's support site, includes forums, tutorials, FAQs and news.
ISP Review: Forum: Discussions of general subjects (e.g. broadband) and of specific ISPs.
Net 4 Nowt Discussion Forum: Discussions of specific ISPs as well as more general topics (e.g. broadband).
Talkbroadband.com: Discussions of cable, ADSL and online gaming.
The Scream: Forum: Discussion of ISPs (especially World Online, the original topic of the forum) and more general topics.
Totalisers: Discussions covering a variety of ISP and net news, much of the discussion covers the ISP Totalise.net.
UnlimitedNet: Discussions and news of free or flat rate internet providers in the UK.