LABOUR'S General Election campaign fund has been given a £1.5m boost from Unite as union bosses fear the Tories could be re-elected on "a tide of big business cash".

It has not ruled out giving more.

Reports have suggested that David Cameron's Conservatives are likely to spend up to the legal limit of £19.5m in the year to polling day, which would be more than double Labour's expenditure of around £8m or so.

At the end of 2013, the Opposition's outstanding debts were almost £6m compared to the Tories' of just £600,000.

Following a meeting of its executive council, Unite said: "It heard reports from the general secretary and the political director concerning Labour's General Election campaign, the development of Labour's policy proposals on a range of issues of importance to Unite members and all working people, and Unite's own plans to campaign for the political change the country needs.

"The union is determined that the present Government should not be allowed to float to re-election on a tide of big business cash, while Labour remains under-resourced."

It added: "The council therefore agrees to make a donation of £1.5m to the Labour Party's campaign funds and will consider further support in due course."

The donation is separate from Unite's affiliation fees to Labour, which are worth around £1.5m a year.

Last year, Unite halved the number of members it affiliates to Labour to around half a million following a review of Labour's links with unions instigated by party leader Ed Miliband.

It was agreed that affiliation fees should only be made on behalf of those who consented to the payment. Consequently, the move led to a cut in affiliation fees by Unite and the GMB union.

In response to Unite's largesse, Bob Neill, the Tory Party vice-chairman said: "This huge donation from Unite doesn't come for free. We all know Len McCluskey and Unite buy Labour's policies, choose Labour's leader and pick Labour's candidates."

He added: "Just three months away from the most important general election of our generation, the choice couldn't be clearer: between a competent Conservative Government that stands up for hardworking British taxpayers and an incompetent Labour party under Ed Miliband who's too weak to stand up to his trade union paymasters."