The popularity of Nick Clegg has plummeted and supporters are deserting his party over plans to raise university tuition fees, said a poll published yesterday. Parliament voted on Thursday in favour of plans to allow English universities to almost treble current fees, a policy that has divided Clegg's Liberal Democrat party and led to violent protests in London. Before May's election Clegg and all his party's MPs had pledged to vote against any rise. In April, a poll rated him as the most popular British party leader since World War Two Prime Minister Winston Churchill. Now 61 per cent describe the deputy prime minister as untrustworthy, says an Ipsos MORI poll for the News of the World.