British MP and former Finance Minister Alistair Darling (C) is pictured as he campaigns for the pro-union 'Better Together' campaign in Edinburgh, Scotland, on September 8, 2014, ahead of the referendum on Scotland's independence. Supporters of the United Kingdom began a fightback on Monday to stop Scotland voting for independence in next week's referendum after an opinion poll put the separatists ahead for the first time. AFP PHOTO / ANDY BUCHANAN        (Photo credit should read Andy Buchanan/AFP/Getty Images)