(FILES) In this April 9, 2015 file photo, British Shadow Business Secretary Chuka Umunna speaks during the launch of the Labour Party Education Manifesto for the general election in central London. Rising political star Chuka Umunna announced May 12, 2015 he will run for leadership of Britain's Labour Party as it seeks to rebuild following last week's devastating election defeat.    AFP PHOTO / BEN STANSALL        (Photo credit should read BEN STANSALL/AFP/Getty Images)