DONCASTER, ENGLAND - SEPTEMBER 26:  Mist shrouds the back straight of Doncaster Racecourse at sunrise on the final day of  the UK Independence Party annual conference on September 26, 2015 in Doncaster, England. After increasing their vote share following the May General Election campaign the UKIP conference this year focussed primarily on the campaign to leave the European Union ahead of the upcoming referendum on EU membership.  (Photo by Ian Forsyth/Getty Images)