General Election 2015
The most recent YouGov poll has put the Conservatives ahead of Labour by two pointsGetty

Labour has moved ahead of the Conservatives in the latest Populus poll as Tony Blair warned voters a referendum on European Union membership could diminish the UK. Ed Miliband's party stands at 33% of the vote while David Cameron's is on 31%.

The figures emerged as the former prime minister said he backed Miliband "100%" and that Cameron did not truly want to leave the EU.

Elsewhere, the Tories pledged to hand the NHS "whatever" it needs to plug a funding gap and Nick Clegg said the Liberal Democrats would use money clawed back from tax avoidance to pay for income tax cuts.

Latest Populus survey - 2,008 adults surveyed on 2-6 April 2015. Margin of error +/- 2%

Populus general election poll
Populus puts Labour ahead

A YouGov survey for The Sunday Times - 1,906 adults surveyed on 3-4 April. Margin of error +/-2%

Conservatives 34%
Labour 33%
Liberal Democrat 10%
Ukip 13%
Green 4%
Others 6%

A Opinium survey for The Observer - 1,974 adults surveyed on 2-3 April. Margin of error +/-2%

Conservatives 33%
Labour 33%
Liberal Democrat 7%
Ukip 14%
Green 7%
Others 5%

A Survation poll for The Sunday Mirror - 1,207 adults surveyed on 2-3 April. Margin of error +/-3%

Conservatives 31%
Labour 33%
Liberal Democrat 9%
Ukip 9%
Green 18%
Others 3%