The Civil Aviation Authority (CAA) regulates all aspects of civil aviation in the UK. Its functions include economic regulation, safety regulation, consumer protection, and the regulation of airports, air traffic services, airlines, tour operators and air travel organisers. In relation to air traffic services it also has competition powers. The site has an Aviation Legislation section (within "About the CAA") with links to the Air Navigation Order 2009 and other UK and EU legislation. Also available to download is the full text of the loose-leaf publication CAP 393: Air Navigation: the Order and the Regulations, which sets out the provisions of the Air Navigation Order as amended and regulations made thereunder.

The Competion Appeal Tribunal (CAT), created by the Competition Act 1998, hears and decides appeals and other applications or claims involving competition or economic regulatory issues. Information and guidance on appeals to the Tribunal includes the text of the Tribunal's rules and a Guide to Proceedings. There are summaries and full documentation (judgments, transcripts, orders, etc) relating to all cases 2001 onwards.

The Competition Commission is an independent body responsible for investigating mergers, market shares and conditions, and the regulation of the major regulated industries. Its site provides extensive information on the work not only of the Competition Commission but also of its predecessor, the Monopolies and Mergers Commission, which it replaced in 1999. Content includes terms of reference, full text reports 1950 onwards, progress reports relating to ongoing inquiries, and news releases.

Competition Law Review is a refereed online journal published twice a year from 2004 onwards by the Competition Law Scholars Forum (CLaSF), an organisation which aims to promote competition law scholarship in the UK, member states of the EU, and states which may accede to the EU. All issues to date are available to download free of charge.

The Department for Business, Innovation and Skills (BIS) was created on 5 June 2009 by a merger of the Department for Business, Enterprise and Regulatory Reform (BERR) and the Department for Innovation, Universities and Skills (DIUS). Its responsibilities include productivity, enterprise, business relations, business law, competition, consumer policy, employment regulation, further and higher education, and science. Many sections of the site, for example those on the Companies Act 2006 and on competition and employment matters, have information on relevant legislation, with links to texts of Acts, regulations and commencement orders.

This section of  the European Commission's web site is devoted to competition law and policy. It provides links to a wide range of documents, including relevant Official Journal content, legislation and case law. There is also an online Competition Policy Newsletter, 1994 to date.

The Global Competition Forum is an initiative of the International Bar Association. Its web site provides links to key competition legislation and selected case law from countries throughout the world, and to the web sites of national enforcement agencies.

Ofcom (the Office of Communications) is the regulator for the media and communications industries, created in December 2003 from a merger of the Broadcasting Standards Commission, the Independent Television Commission, Oftel, the Radio Authority and the Radio Communications Agency. Information and documents on the site include the Ofcom Broadcasting Code, policy guidelines, and selected material from the former sites of the defunct "legacy regulators". An Enforcement section within the "Stakeholders" area includes details of Ofcom's competition and other regulatory enforcement casework since 1996, in the Competition and Consumer Enforcement Bulletin.

The Office of Fair Trading (OFT) is a non-ministerial government department which promotes and protects consumer interests in the UK and ensures that businesses are fair and competitive. General information, help and advice on the site is directed at both consumers and businesses. Documents reproduced include press releases, reports, decisions, consultation documents and recent annual reports. The Publications section under the "OFT's work" tab includes leaflets, Codes of Practice and guidance on legislation.

The main function of the Office of Rail Regulation (ORR) is to regulate Network Rail's stewardship of the UK national rail network. Like several other economic regulators it exercises, concurrently with the Office of Fair Trading, competition powers within its sector. Since 1 April 2006 it has also been the health and safety regulator for the rail industry. Its site has a wide range of information and documents, and links to railway-related legislation.

Ofgem (the Office of Gas and Electricity Markets) regulates Great Britain's gas and electricity markets. Like several other industry regulators it also exercises, concurrently with the Office of Fair Trading, competition powers within its sector. The extensive information and documentation on the site includes links to legislation: to access these first select "About Us", followed by "Enforcement", then "Ofgem's Powers".

Ofwat (the Water Services Regulation Authority) is the economic regulator of the water and sewerage industry in England and Wales. It also plays a role under the Competition Act 1998 in promoting competition within its sector. The extensive range of publications available on the site includes guidance leaflets, codes of practice, consultation papers, and its annual reports to Parliament.

The Utility Regulator is the informal name of the Northern Ireland Authority for Utility Regulation (NIAUR), which regulates the electricity, gas, water and sewerage industries in Northern Ireland. Like its counterpart in Great Britain, Ofgem, NIAUR also exercises powers within its sector, concurrently with the Office of Fair Trading, under the Competition Act 1998. Publications on the site include consultation papers 2002 onwards and press releases 1997 onwards.