New poll suggests Tory support slips.
The number of voters intending to back Labour has risen by two points to 42 per cent while those planning to support the Tories has fallen five points to 35 per cent, the Reuters/Ipsos Mori survey found.
The Tories' Liberal Democrat coalition partners saw their support creep up a single point to 10 per cent - still significantly down on their pre-government ratings.
The findings on voting intentions will be a boost to Labour leader Ed Miliband and suggest Prime Minister David Cameron and his Lib Dem deputy Nick Clegg would be turfed out of power if the coalition broke down and a general election was called.
However, the poll also indicated widespread scepticism about Mr Miliband's readiness for Number 10.
Only 17 per cent felt he was ready to be prime minister, with 69 per cent saying he was not.