The Labour Party has been embroiled in fresh chaos after the party's deputy leader said a key group of Jeremy Corbyn supporters "have to be stopped" in their attempts to seize control of the party.
Tom Watson blasted Jon Lansman, leader of the pro-Corbyn campaign group Momentum, on Twitter after the group was accused of planning a party takeover in tandem with the Unite union.
A series of recordings reveal that Momentum - an organisation which was set up in the wake of Mr Corbyn's 2015 leadership election victory and now numbers more than 100,000 members - plans to formally join forces with Unite to create a power base which will ensure it maintains control of the party long after the current leader steps down.
Lansman is heard telling members it is crucial to change the party rules to ensure candidates backed by Momentum are always up for election.
News of the plans comes as Mr Corbyn continues to perform badly in the opinion polls, with critics suggesting he and his Momentum supporters are too left-wing to be taken seriously by the British electorate.
In response to the news, Watson wrote directly to Lansman on Twitter, saying "You've revealed your plan. If you succeed you will destroy the Labour Party as an electoral force. So you have to be stopped."
Lansman responded by ensuring that Momentum would never promote non-Labour members to senior positions, or allow them to vote - although they could attend meetings.