UK Elections: David Miliband criticises his brother Ed's election campaign
David Miliband has criticised his brother Ed's general election campaign but ruled himself out of running for Labour leader.
Mr Miliband, who runs a charity in New York after quitting British politics when Ed beat him to the Labour leadership in 2010, told the BBC voters "didn't want what was being offered".
He added: "I'm clearly not a candidate in this leadership election, the commitment I have to the job I've got doesn't change."
Mr Miliband said he would not endorse any candidate but added: "I hope that a range of leadership candidates will come forward - I am not here to endorse any candidate.
"What I think it vital is there is absolutely no delusion about what happened, why it happened, and the scale of the challenge that exists not just in England and Wales but in Scotland as well."
David Miliband said: "Both in 2010 and 2015, Gordon (Brown) and then Ed allowed themselves to be portrayed as moving backwards from the principles of aspiration and inclusion that are at the absolute heart of any successful progressive political project.
"The answer is not to go back to 1997, it's to build on the achievements and remedy the weaknesses, but never to end up in a position where the electorate think you are going backwards rather than addressing the issues of the future."
Speaking in New York, Mr Miliband said that last week's election result was "devastating" for the Labour Party and its supporters.
But he said: "There's absolutely no point in blaming the electorate. Any suggestion that they didn't 'get it' is wrong. They didn't want what was being offered."