The polls will be tough reading for the Conservatives tonight

Although they are still pretty close, and have been jumping around for days.

What will really excite the Labour camp is that for the first time Ed Miliband is personally polling better than the PM – although more voters think Mr Cameron is more Prime Ministerial.

Labour enjoys a four-point lead in the latest opinion poll of the General Election campaign.

Mr Miliband’s party gained two points on last week, while the Conservatives dipped one, to move ahead by 35% to 31% in the Survation research for the Daily Mirror.

The Labour leader – despite still trailing his Tory rival as the best to be prime minister by 37% to 25% – will be delighted at their latest personal approval ratings after lagging consistently behind throughout most of his leadership.

The gap between those saying he was doing a good and bad job was +3.2 points, to Mr Cameron’s +2.3. It also showed overwhleming support  – 59% for to 16% against – for Labour’s proposal to abolish non dom tax status.