Unite general secretary Len McCluskey launches a major attack on Ed Miliband's Labour leadership in an article for the Guardian newspaper:

Ed Balls's sudden embrace of austerity and the public-sector pay squeeze represents a victory for discredited Blairism at the expense of the party's core supporters.

"It also challenges the whole course Ed Miliband has set for the party, and perhaps his leadership itself.

"Unions in the public sector are bound to unite to oppose the real pay cuts for public-sector workers over the next year.

"When we do so, it seems we will now be fighting the Labour frontbench as well as the government…

"It is time for those who want a real alternative centred on investment, job creation and public intervention to end the slump – and a Labour party that will articulate that to get organised in parliament and outside."