Ed Miliband should rule out a coalition with the Liberal Democrats even if Labour fail to secure a majority in next year's general election, one of the party's biggest backers has said.
Unite General Secretary Len McCluskey urged Mr Miliband to say he would govern alone even if the party falls short of a majority in next year's general election.
The comments come amid reports that David Cameron will make a commitment not to sign another deal in the event of a hung parliament.
Speculation that a potential alliance between Labour and the Lib Dems has increased in recent months, after Nick Clegg praised the way the opposition had "changed" under Mr Miliband's leadership.
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