ws1.companies-house.gov.uk Companies House
Companies House has three main functions: the incorporation, re-registration and striking-off of UK companies; the registration of documents that must be filed under company, insolvency and related legislation; and the provision of company information to the public.

www.accountingweb.co.uk Accounting Web
Full statutory and financial information on over 3.6 million live UK companies - including 2.0 million unincorporated businesses and full details of directorships. Basic searching is free, and for a charge you can have a full report which details all companies persons are a director of.
www.creditman.biz/uk/ Business Credit
Business Credit Management UK is the website for all business related credit needs. The site is specifically designed to provide/share solutions and information to small to medium business owners as well as credit professionals within various industries - all over the world.
www.icc.co.uk/ ICC Information
ICC was founded in 1969 as a direct result of a change in Company law, which required all UK limited companies to disclose certain financial information via Companies House. Key content includes 5.3 million British businesses, every British Shareholder and Director, Credit Risk Scores and Full Financial analysis on every limited company.
www.kompass.co.uk Kompass UK
This site has been specifically designed for all with particular inference to UK purchasers and suppliers. It also contains extra information and links to organisations to assist you in making informed business decisions. 1.6m company profiles in over 70 countries, 3 million named executives, 23 million product and service references and 700,000 trade names.

www.carol.co.uk/index.html CAROL - Company Reports
Is an on-line service offering direct links to the financial pages of listed companies in Europe and the USA. CAROL provides direct access to companies’ balance sheets, profit & loss statements, financial highlights etc.
www.ukdata.com UK DATA
This site contains 28 million pages of data with online credit and financial reports on 1.4 million UK limited companies, together with copies of all filed documents and full information on every British company director. Requires that you first apply for an account.
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