David Cameron is putting Britain's national security at risk by paying nearly £2billion to help Turkey, Serbia and Albania join the European Union, Iain Duncan Smith has warned.

Vote Leave, the campaign group jointly led by Michael Gove, said that Britain will help fund £14million worth of "pre-accession assistance" between 2014 and 2014 to countries hoping to join the EU.

Iain Duncan Smith, the former Work and Pensions Secretary, said that Britain's contribution is a "staggering waste of money" and will "make Britain less safe".