Civil Aviation Authority - CAA. Regulates the financial affairs and safety responsibilities of UK airlines and airports. Includes a variety of consultation and policy documents. - http://www.caa.co.uk
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