Ed Miliband will promise to provide global leadership on tackling poverty and climate change if he wins the General Election in May.
In a speech later today, the Labour leader will insist that a commitment to the green agenda and a desire to reduce inequality are "at the heart of my beliefs" rather than being "part of a branding exercise".
Miliband will promise to use a series of major global summits after the election to push for action to eliminate extreme poverty by 2030 and reduce global net carbon emissions to zero by 2050.
He is also set to reaffirm Labour's commitment to decarbonising the UK's electricity supply by 2030 and claim that "tackling climate change is the most important thing I can do in politics for my children's generation".
After Ed Miliband, Nick Clegg and Nigel Farage told David Cameron they are prepared to go ahead with TV debates ahead of the election - with or without him, he will be expecting a tough time at Prime Minister's Questions (PMQs).
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Ed Miliband stressed Labour has no manifesto proposals funded by additional borrowing, adding, "Not a single one."
The Labour leader dismissed Conservative claims that the opposition had made £20.7 billion in unfunded spending commitments.
Miliband said the party would make cuts to public spending but deal with the deficit "responsibly," including through higher taxes on the wealthiest.
Labour will show they "can do more with less", the leader said.
Labour leader Ed Miliband has pledged "never again dismiss people's concerns about immigration."
"Britain cannot, should not, close ourselves off from those who can contribute to our economy and our country," he continued.
"But people do want to know there are fair rules".
Ed Miliband has claimed Britain is "a country of food banks and bank bonuses" as he set out Labour's stand for the General Election.
"They [the Conservatives] call that a success," Miliband told Labour supporters in Salford.
"Well I don't and the British people don't either," he added.
Ed Miliband has announced Labour will hold four million individual conversations with voters setting out their case in the run-up to polling day.
That will be almost double the number achieved at the last election in 2010.
Ed Miliband has said his party is "fighting for Britain" as Labour's General Election campaign got underway.
Ed Miliband has hit back at a Tory attack on his party's spending plans, saying the election will be a choice between "hope with us and falsehood from the Conservatives."
The Labour leader told BBC's Breakfast: "The Tories are saying that they want to go back to 1930s levels of public spending as a share of our national income, that's levels of national income not seen for 80 years or so in our country.
"I don't believe you can protect the NHS with that kind of plan. It's extreme, it's ideological and I think it will be really bad and damaging for our public services."
Setting out his plans for more integration between health and social care, Miliband insisted that Labour's proposals for a £2.5 billion annual funding boost would ensure the NHS is sustainable.
David Cameron has used his New Year's message to warn against his "risk"-driven election rivals, who he said will take Britain "backwards".Read the full story ›
Tony Blair has denied saying Labour leader Ed Miliband is too left wing to win the next General Election.
The former Labour prime minister told a magazine his party was "traditionally" defeated at the ballot box when presenting "traditional" left-wing policies against "traditional" right-wing opposition.
But Mr Blair took to Twitter to say the comments mis-represented his faith in Mr Miliband's ability to win the 2015 election, as ITV News Political Correspondent Emily Morgan reports.