Tony Blair was Prime Minister of the United Kingdom.
James Gordon Brown ( born 20 February 1951 ) is a British politician who was Prime Minister of the United Kingdom and Leader of the Labour Party from 2007 to 2010 . The Labour Party is a centre-left political party in the United Kingdom . Tony Blair . In May 1997 , the Labour Party won a landslide general election victory , the largest in its history , allowing Blair , at 43 years old , to become the youngest Prime Minister since 1812 .