The Commissioners for Revenue and Customs Act 2005 (c 11) is an Act of the Parliament of the United Kingdom which combined the Inland Revenue and HM Customs and Excise into a single government department, HM Revenue and Customs. The Act also established the Revenue and Customs Prosecutions Office, and provided for inspections of HMRC by HM Inspectors of Constabulary to ensure that it complies with the law. The separation of prosecution functions to an independent body followed recommendations in the Gower Hammond Report and the Butterfield Report into failed prosecutions.