Labour will address immigration concerns head on today with an attack on the Tory record and a pledge to create a new Government task force to crack down on exploitation.

Ed Miliband will say that under a Labour government 100 staff will be challenged to increase prosecutions and fines against bad employers who encourage low skilled migration and undermine the minimum wage.

The news comes as he is set to visit Wirral this afternoon, taking questions from voters in a specially arranged question and answer session.

Mr Miliband will say abusive practices such as forcing scores of workers to live in cramped houses for illegally low wages is driving unskilled migration and hurting conditions for local workers.

And he will condemn the Prime Minister for not meeting his promise to cut immigration to the tens of thousands, insisting Labour will not make pledges it cannot meet.

David Cameron will hit the campaign trail with a promise to put a leading pensions campaigner in the Lords and make her a minister in his new administration.

Ros Altmann will be placed at the "heart of government" with responsibility for financial education and consumer protection if the Tories win in May.

Mr Cameron said: "There are also great new products like the flexible Isa, a real encouragement for savings with the single tier pension, and now at the heart of government, if we're elected, Ros Altmann - the country's leading pensions, savings, and financial education expert to make sure that we make the most of this great revolution in favour of savings and financial security for many in our country."

The Liberal Democrats will focus on apprenticeships. Business Secretary Vince Cable will promise to double the number of employers offering on-the-job training and promote pledges to offer incentives to small businesses.

Ukip leader Nigel Farage is expected to campaign in his target constituency of South Thanet.