Gordon Brown has said he will take "full responsibility" if Labour fails to win the general election.

Joined by his wife Sarah on GMTV, he said he would take responsibility for "whatever happens" onThursday.

The prime minister said that if he "couldn't make a difference anymore" he would go off and do something else.

Despite some Labour ministers now calling for tactical voting, Mr Brown said he wanted people to vote Labour, saying the party could still win.

Mr Brown was asked whether, if people turn their back on Labour, it would be because of the party in general or him personally.

"Well I’ll have to take responsibility, and I will take full responsibility if anything happens, ” replied the prime minister.

"But I still think there are thousands of people who've still to make up their minds."

Mr Brown was then questioned about whether he would stand down if it meant Labour could stay in power in the event of a hung parliament.

He replied:11 Well I don't think it'll work that way, but if I couldn't make a difference anymore I would go off and do something else."

Mr Brown said he might do charity or voluntary work, and that he didn't "want to do business or anything else — I just want to do something good". The prime minister said Labour was the "serious party", in contrast to the Conservatives and the Liberal Democrats.

"The Conservatives are too big a risk, the Liberals can't explain what they are doing -their policies don't add up," he said.

Mr Brown also returned to his warning that millions of people would miss out on child tax credits underTory and Lib Demplans.

"I felt so passionately about what is happening to child tax credits," he said. "Six million people benefit from them... it is wrongto take them away.”

The Conservatives are proposing that parents earning more than £50,000 between them will not get the credits, while the Lib Dems have also proposed restricting them.

The Tories say their plans to cancel most of Labour's proposed 1% rise in National Insurance would leave the majority of families better off, while the Lib Dems propose abolishing income tax for the first £10,000 of earnings, which they say will help people on low and middle incomes.