Air Accidents Investigation Branch
Responsible for the investigation of civil aircraft accidents and serious incidents within the UK. Provides background on the AAIB, regulatory information and bulletins on accidents and serious incidents.
http://www.aaib.dft.gov.uk

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 for the Regulation of Electricity and Gas
OFREG. Regulates the electricity and gas markets in Northern Ireland.
http://ofreg.nics.gov.uk

Office of Gas and Electricity Markets.
OFGEM. Regulates the electricity and gas markets Great Britain.
http://www.ofgem.gov.uk

Office of Telecommunications
OFTEL. Regulates telephone and data providers.
http://www.oftel.gov.uk

Office of Water Services
OFWAT. Regulates water and sewerage providers.
http://www.ofwat.gov.uk