Support for the Liberal Democrats has plunged dramatically since the election, according to a new opinion poll. With a day to go before the party's annual conference opens in Liverpool, the latest daily YouGov survey put the party on just 12 per cent, a fall of 11 points since May.

The Conservatives are down one to 41 per cent, with Labour down one to 38 per cent. If repeated at the election on a uniform swing, the latest figures would leave the Tories 19 seats short of a majority in a hung parliament. In an indication of the losses the Lib Dems could sustain at the next election, Nick Clegg's party would be reduced to a rump of 12 seats.