Established in 1840, HM Railway Inspectorate (HMRI: Her Majesty's Railway Inspectorate) is the British organisation responsible for overseeing safety on Britain's railways and tramways. Previously a separate non-departmental public body it was, from 1990 to April 2006, part of the Health and Safety Executive, then was transferred to the Office of Rail and Road and finally ceased to exist in May 2009 when it was renamed the Safety Directorate. However, in the Summer of 2015 its name has been re-established as the safety arm of ORR. August 2015 being the 175th anniversary of its founding.