Campaigners pushing for the U.K. to leave the European Union stepped up their focus on immigration as divisions in David Cameron’s Conservative Party threatened to drown out arguments about the economic advantages of remaining in the bloc. While online polls suggest the race is too close to call, some phone surveys have shown a wide lead for “Remain.” The most recent online survey, completed by BMG Research May 25, showed 44 percent in favor of staying in the EU and 45 percent supporting an exit. A phone poll by Survation that ended a day earlier gave the pro-EU camp a six-point lead. But how much trust should we put in polls? YouGov CEO Stephan Shakespeare discusses with Bloomberg's Nejra Cehic in London and Manus Cranny in Dubai on "Countdown."
