Price and Company
Accountants & Tax Advisers
Links
Companies House: some information is free!
The Department of Works and Pensions.
H. M. Revenue & Customs. The combined site following the merger of HM Customs & Excise with the Inland Revenue:
IR35 Links
Shout 99 - a freelancer network.
Accounting Web - many in-depth articles on IR35.
HM Customs &Revenues comments/advice on the issue. Very useful but treat with some caution.