Civil Aviation Authority
CAA. Regulates the financial affairs and safety responsibilities of UK airlines and airports.
http://www.caa.co.uk

Competition Commission
Responsible for investigating allegations of restrictive practices and monopolies.
http://www.mmc.gov.uk

Office of Fair Trading
OFT. Regulates consumer protection and commercial activity.
http://www.oft.gov.uk

The Coal Authority
Regulates the licensing of coalmines and residual functions of the former British Coal.
http://www.coal.gov.uk