David Cameron ridicules Boris Johnson's second EU referendum idea

Prime minister aims jibes at London mayor in Commons as cracks appear in Tory truce over EU referendum David Cameron has vented his frustration at Boris Johnson over Europe, as he ridiculed the mayor of London over his apparent call for a second EU referendum and came close to accusing him of backing a vote to leave to boost his chances of one day leading the Conservative party.In a sign that a Tory truce on Europe is under severe strain before the official campaigning has even begun, the prime