The ICM survey for the Sunday Telegraph showed Nick Clegg’s party dropping four points since a similar survey last week to slump into third place behind Labour, with the Tories on 36 per cent, Labour on 29 per cent and the Lib Dems on 27 per cent. If repeated at the election on an even swing across the country, the figures would leave David Cameron at the head of the largest party in the House of Commons with 279 MPs – 47 short of an outright majority.