David Cameron is set to offer EU referendum, says London Mayor Boris Johnson

Cameron will offer voters in-out referendum over EU membership, says BorisBoris Johnson 'unveiled' PM's plan to hold a referendum on EU | UPDATED: 08:05 GMT, 10 December 2012 David Cameron is preparing to promise a referendum offering either a new, looser relationship with the EU or a British exit, Boris Johnson suggested yesterday. The Prime Minister will set out his thinking on Britain’s future in Europe in a major speech within weeks amid growing agitation in the Tory party over the issue