On the face of it, Ed Miliband’s non-referendum pledge held a clear upside and a clear downside for Labour.
Matching David Cameron’s guarantee of an in-out referendum would mean that if he won, Miliband would have to spend a good deal of his premiership campaigning to keep Britain in the European Union – a battle he might lose. He would be the Prime Minister who took Britain out of the EU, and would probably have to resign. And all because of a promise he had never wanted to make in the first place.
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