ELEXON  
   Balancing and settlement code company, which manages the electricity and trading arrangements of England and Wales. Details of panel, signatories, papers and other information.
   http://www.elexon.co.uk

Office of Gas and Electricity Markets  
   Ofgem. Regulates the electricity and gas markets in Great Britain. All consultation and decision documents, and many consultation responses from regulated companies and other organisations.
   http://www.ofgem.gov.uk/

Office for the Regulation of Electricity and Gas  
   Ofreg. Regulates the electricity and gas markets in Northern Ireland. Consultation and decision documents.
   http://ofreg.nics.gov.uk/

Energywatch  
   Energywatch represents the interests of gas and electricity consumers in Great Britain. Provides practical information for consumers and some policy documents.
   http://www.energywatch.org.uk

Health and Safety Executive - Downstream gas  
   The HSE oversee safety regulation in downstream gas. Includes codes of practice, incident reports, and information for the industry.
   http://www.hse.gov.uk/gas/index.htm

CORGI Gas  
   CORGI oversees the safety of gas installations. Provides some information about the law and a facility to check installers' registrations.
   http://www.corgi-gas-safety.com

Nuclear Safety Directorate  
   Part of the Health and Safety Executive responsible for the safety regulation of the civilian nuclear industry. Some policy documents and a variety of reports on cases.
   http://www.hse.gov.uk/nsd/