One enduring legacy of the Windscale accident was the subsequent attention given to emergency planning around nuclear sites. Multi-agency committees were established, including elected members of local councils and all the emergency services. Regular exercises are held to test responses to an incident both on and off-site. Arrangements were updated in the light of other events, particularly the accident in the USA at Three Mile Island and the major accidents at Chernobyl and Fukushima. Off-site incident control now rests with the local police and briefing goes all the way to top levels of government.