Deputy Labour leader Tom Watson has called for a ban on hedge funds to commission private exit polls for the EU referendum. Watson claimed that hedge funds "stand to gain millions" by knowing the outcome of the EU referendum through their private polls and called on Prime Minister David Cameron to ban them from approaching pollsters.  Watson told The Guardian: "Hedge funds who commission their own private exit polls stand to make many millions of pounds learning the likely outcome of the referendum hours before the UK government and the British people find out if we have voted to leave or stay...