UK poll gives 'Brexit' campaign 4 point lead, biggest since October 2014

The campaign for Britain to leave the European Union opened up its biggest lead in more than a year over the rival 'in' campaign, according to a poll conducted by YouGov to gauge public opinion ahead of a referendum. Prime Minister David Cameron has promised to hold a referendum on Britain's EU membership by the end of 2017 after attempting to negotiate reforms to address voter concerns about issues such as sovereignty and immigration. Cameron hopes to seal a reform deal in February and could ho