Ofcom and the ISPA require that all UK Internet Service Providers (ISP) be members of an approved ADR complaints handling scheme (CISAS or OTELO). However, far too many broadband providers do not clearly publicise this information and, as a result of many requests, the regulator has put a full list on its website.

ADR Schemes:
OTELO - http://www.otelo.org.uk
CISAS - http://www.cisas.org.uk

Ofcom's ADR ISP Member List:
http://www.ofcom.org.uk/consumer/2009/12/adr-schemes/

ADR schemes are meant to supplement, not replace, a providers own internal complaints procedures. The advantage they have is that an ADR is free and can order your ISP to either fix the problem or pay compensation. ISPs are allowed 8 weeks to resolve a dispute before an ADR can be involved.

It’s worth pointing out that this data has always been available from the respective ADR websites. Though we do note that some ISPs like Vispa Internet still appear to be missing from the list (this will be corrected soon because Vispa are currently joining CISAS).

UPDATE 11:30am

Some additional information from the ISPA.