Lord Ashcroft poll shows that 56 per cent of voters would like to see a Labour-led government after the next election.
A fall in support for the Lib Dems will propel Labour to victory in Tory marginals.
What lies behind Labour's 10-point poll lead?
The Tories surge past Labour in the polls after Cameron's rejection of a new EU treaty.
Lib Dems fall to seven per cent in new poll, just two points ahead of Ukip.
Labour lead up to eight points as Tory support falls to just 33 per cent in new Populus poll.
Latest YouGov poll puts the Tories on 39 per cent, just a point behind Labour.
New ICM poll puts the party on 18 per cent, their highest rating since September.
Latest opinion poll puts Labour on 42 per cent with the Tories trailing on 37 per cent.
Support for Clegg’s party falls to just 8 per cent – the lowest level in 20 years.
Latest opinion polls puts Labour two points ahead of the Conservatives.
Ed Miliband's party opens up a two-point lead in the latest ComRes poll.
Tories behind in new Populus poll for the first time since November 2007.
Support for party plummets to lowest level in 13 years.
Support for Labour rises four points to 40 per cent in the wake of the student fees announcement.
Poll shows 83 per cent support child benefit decision - Labour must be clearer in its defence of the
A major psychological boost for Ed Miliband.
Party's poor poll ratings trouble activists on eve of annual conference.
Labour draws level with the Conservatives for the first time since October 2007.
73 per cent of voters no longer know what the party stands for, latest poll finds.
Liberal Democrats fall to 12 per cent in new YouGov poll, their lowest rating since 2007.
Latest Ipsos MORI poll puts Labour on 38 per cent, with Tories just ahead on 40 per cent.
But how long will the honeymoon last?
Poll shows voters approve of George Osborne's Budget as Tory support reaches post-election high.
There has been no mass defection of voters to Labour from the Liberal Democrats.
Final pre-election polls show the Tories around 30 seats short of a majority.
Tories just 5 points ahead of Labour as Lib Dems drop 4 points to 24 per cent.
Tories down one to 33 per cent as Labour rises three to 28 per cent in new Opinium survey.
Conservative support down three to just 33 per cent in latest ICM survey.
Conservative lead back up to 10 points in latest ComRes poll.