Anthony Charles Lynton "Tony" Blair (born 6 May 1953) is a British politician who served as Prime Minister of the United Kingdom from 1997 to 2007. He was Leader of the Labour Party from 1994 to 2007 and Member of Parliament (MP) for Sedgefield from 1983 to 2007. On the day he stood down as Prime Minister and MP, he was made official Envoy of the Quartet on the Middle East on behalf of the United Nations, the European Union, the United States and Russia.