Anyone following David Cameron’s recent twists and turns on the EU could be forgiven for feeling dizzy. At one time, there was a “cast-iron guarantee” of a referendum. Then, last year, he three-line-whipped Conservative MPs to oppose the idea of holding one. Events last week did nothing to add clarity. On Friday in Brussels, with Angela Merkel looming over him, we were told that there would be no referendum. But 48 hours later, in an article in The Sunday Telegraph, he suggested that a referendum might be a possibility, though not just yet.