Early motor vehicle development in the UK had been effectively stopped by a series of Locomotive Acts introduced during the 19th century which severely restricted the use of mechanically propelled vehicles on the public highways. Following intense advocacy by motor vehicle enthusiasts, including Harry J. Lawson of Daimler, the worst restrictions of these acts, (the need for each vehicle to be accompanied by a crew of three, and a speed limit in towns), was lifted by the Locomotives on Highways Act 1896. Under this regulation, "light locomotives" (those vehicles under 3 tons unladen weight) were exempt from the previous restrictions, and a higher speed limit – was set for them. To celebrate the new freedoms Lawson organised the Emancipation Run held on 14 November 1896, the day the new Act came into force. This occasion has been commemorated since 1927 by the annual London to Brighton Veteran Car Run.