 Edward Samuel " Ed " Miliband ( born 24 December 1969 ) is a British politician who was Leader of the Labour Party as well as Leader of the Opposition between 2010 and 2015 . He has been the Member of Parliament ( MP ) for Doncaster North since 2005 and served in the Cabinet from 2007 to 2010 under Prime Minister Gordon Brown . He and his brother , David Miliband , were the first siblings to sit in the Cabinet simultaneously since Edward and Oliver Stanley in 1938 . 
