Glue leader Len McCluskey has accused a “cabal” of Labour MPs of plotting against their boss Jeremy Corbyn.
The union boss said some Labour MPs did not allow Mr Corbyn’s mandate although their alternative vision for the country was “weary and uninspiring”.
In a speech in Oxford, he urged malcontents to “stop the sniping” and to “ferry the fight” to the Tories.
Mr Corbyn has faced criticism of his leadership and stance on stems such as defence and counter-terrorism.
His handling of a shadow cabinet reshuffle terminating month, in which one prominent critic was sacked and opponents of the leader’s dispose on Trident were sidelined, was widely criticised.
Earlier on Tuesday, a older figure in the shadow cabinet said it might be impossible for the rty to reach an favoured position on whether to renew the UK’s nuclear weapons system.
But Mr McCluskey reported it was time for those who have questioned the direction in which Mr Corbyn is compelling the rty to pipe down, saying the Labour leader deserved their triotism.
“Their analysis of Labour’s defeat in 2015 was unconvincing, their designs stale, minimalist and uninspiring – and for the most rt, they have silently not shaped up after Corbyn’s victory,” he said. “Until they can do that, they are a acreage without a programme; a cabal without a critique.”
The “continual war of attrition” between many camps in the rty was “achieving nothing beyond taking the pressure off the supervision”, he said.
“So my clear message to the plotters is – stop the sniping, clog up the scheming, get behind Jeremy Corbyn and start taking the fight to the Tories.”
In his antagonistic to austerity and to foreign military interventions, Mr Corbyn was in tune with openly opinion, Mr McCluskey said.
The Labour leader, he said, offered a “revolutionary challenge to the status quo and business-as-usual politics”, likening the insurgency which sent him to victory in September’s leadership contest to US Democratic politician Bernie Sanders’ tendency bid for the White House.
“What Jeremy Corbyn offers – like Bernie Sanders in the US – is a pursuit out of corporate corruption, a rejection of the austerity that has made the UK the most unequal concision in the G8 and the promise that politics and politicians can and will put things right for customary working people.”
And he criticised those who, he claimed, were suggesting May’s selections in Scotland, Wales, and across England were a referendum on the Labour command.
“I am not a supporter of… changes designed to intimidate or undermine Labour MPs. But I also in that we need to issue a clear warning to those who are advocating the ordered Labour rty being used as a lever to force Jeremy Corbyn out.”