Cameron faces Johnson challenge in Brexit campaign

John Springford of the CER, said Cameron "did well politically" at last week's Brussels summit and has done "the best that he could" with Conservative eurosceptics. "The deal won't do that much to convince anybody," Springford said, adding that aside from the most ardent EU supporters and opponents "those in the middle will vote on the big arguments about economy and security".

...Springford identified two more "risks" for Cameron that could turn public opinion against the European Union - a massive new influx of migrants into Europe and a fresh eurozone crisis as Greece prepares for an important debt repayment in June.