The PM said during the first 2010 leaders' debate that the Lib Dem policy was too expensive.
The former PM, who has praised Miliband's party reforms, has had talks with Labour figures about giving money.
"Let us reject a damaging divorce, and instead vote for the best of both worlds: More of the decisions that matter to Scots being taken here in Scotland, backed up by the strength, stability and security of the UK."
Danny Alexander and Lynne Featherstone are both vulnerable to Labour challenges.
The Scottish First Minister's claim that independence is needed to make Scotland and the rest of the UK more "progressive" is undermined by the prospect of the election of Labour in 2015.
Whatever the outcome in September, Scotland won't have to wait too long for even greater autonomy
Far from creating a postcode lottery, greater localism can lead to lower levels of regional inequality.
The decision means the party will now be entitled to equal levels of TV coverage as the other main parties.
We need an end to unfair sanctions and new penalties for those who consistently break the rules.
Contrary to reports, the mayor is keeping all options open.
The Labour leader’s changes have left his party best placed to overcome the crisis of political participation.
The Foreign Secretary says Ukraine "is an entirely different situation" after John Kerry criticises Russia for "invading another country on completely trumped up pretext".
With the former SDP leader, Tony Blair and Len McCluskey all backing his reforms, Miliband has built an impressively large coalition of support.
After today's comfortable victory, far greater political and financial challenges lie ahead for the party.
"Today, let’s vote to change our party. Let’s build a movement. So that tomorrow, we can change our country."
The Prime Minister used to be more honest about Kremlin bullying of its neighbours.
The Labour leader's message: the reforms will get working people back into politics, transfer power from MPs to party members, and help turn Labour into a movement again.
The Chancellor may think he is a realist playing hard politics. But these are tactics the Scottish government could also successfully employ.
It will become harder for the PM to insist he can succeed when the europhile and the europhobe both declare he will fail.
"How can you be both a Muslim and an English man?" asks activist at meeting the party tried to keep reporters out of.
Having successfully transcended his party's left-right divide, the Scottish Secretary could be the man to hold the Lib Dems together after the next election.
Having failed to predict the hung parliament of 2010, commentators may now be making the reverse error by underestimating the chance of an overall Labour victory.
Too many essential workers are being priced out of the capital. Rent controls could address the uncertainty and unaffordability they face.
Miliband doesn't want to make a pledge that raises more questions than it answers.
The Prime Minister can see the strategic as well as the economic logic that keeps Britain in Europe.
The first real-terms increase since 2008 will make it easier for the Tories and the Lib Dems to argue that the trend is moving in the right direction.
Just as earlier iterations have faded fast, so too will this blue collar phase pass unnoticed and unloved.
By forcing Cameron to reaffirm his green credentials, the Labour leader skillfully drove a wedge between the PM and his party.
As the blue collar modernising group warns, a deal with UKIP would alienate the centrist voters that the Tories need if they are to ever win a majority again.
A report on the policy by the Department of Energy and Climate Change is released following a freedom of information request by the New Statesman.