Dave in lead as Lib Dems lose big mo

The latest YouGov poll puts the Conservatives on 34 per cent, Labour on 29 per cent and the Lib Dems on 28 per cent. This suggests, not surprisingly, that the Lib Dem surge has ended and that it may start to fade, although some of the boost will remain. However, this lead would not be enough to give Dave Cameron an overall majority, although it would create a difficult situation for the Lib Dems after the election. Would they deny office to the party with the largest number of votes and seats?