The departure of the party's leader leaves it without an immediately obvious successor.
The Unite head's comments suggest the shadow health secretary could win his support in a future leadership contest.
The Labour leader aims to position his party as the only one offering "credible" change.
Health service leaders have released a report calling for drastic changes; could this help Ed Miliband on the way to the election?
The Labour London mayoral hopeful wants higher tax bands introduced by local councils.
The Labour leader's plan to raise the main rate to £8 by 2020 is more radical than Milburn suggests.
We need a mayor who works to help Londoners with second jobs, not those with second homes.
Pledge will be funded through £750m raised by new windfall levy on tobacco firms.
Both parties will be portrayed as unserious and lacking in credibility.
Football supporters will be given the right to appoint and remove up to a quarter of a football club’s board of directors under new proposals from the Labour Party. Fans will also be given the right to buy up to 10 per cent of a club’s shares on offer during a change of ownership. We assess the proposals and get the views of Supporters Direct chief executive Robin Osterley.