Tories retain large lead over Labour but hung parliament cannot be ruled out.
Tory lead rises to ten points in new YouGov poll, large enough to give Cameron a majority.
David Cameron set to win a small majority, according to latest YouGov poll.
Tory lead cut to five points in latest YouGov poll and to seven in new Populus poll.
Conservative lead down two points in first poll since Gordon Brown called an election.
David Cameron on course to win a small majority, according to new YouGov poll.
New ICM poll suggests Labour could remain the single largest party after the election.
Latest YouGov poll suggests hung parliament remains likely.
Conservative lead up to seven points in latest YouGov poll.
Latest figures would leave the Tories 17 seats short of a majority.
Two Sunday newspaper polls put the Conservatives on 37 per cent.
But YouGov figures would still leave Labour as the single largest party.
Two per cent lead is the party's joint lowest since December 2008.
Conservatives remain just four points ahead of Labour in latest YouGov poll
With weeks to go before the election, polls still show hung parliament is likely.
Tory lead rises three points in wake of British Airways strike.
Latest YouGov poll suggests Labour would remain the single largest party.
New YouGov poll suggests the Conservatives' lead over Labour remains fragile.
Latest figures would leave Labour 33 seats short of a majority.
Tory lead rises to nine points in latest ICM poll and eleven points in Opinium survey.
Poll suggests an increasing number of voters would like to see a hung parliament.
Latest YouGov poll would leave Brown 19 seats short of a majority.
David Cameron and his party look short of the seats they need for a majority.
Latest daily YouGov poll suggests Labour could emerge as the single largest party.
New poll suggests David Cameron will struggle to win an overall majority.
Party reaches crucial figure of 40 per cent for first time since mid-February.
Voters also expect David Cameron to perform best in the leaders' debates.
Latest figures would leave Labour as the largest single party.
Tory lead recovers but hung parliament is still likely.