David Cameron has told Jeremy Corbyn he should resign as leader of the Labour Party for the good of the country.
Facing the Labour leader across the Commons, the prime minister told him: "It might be in my party's interest for him to sit there, it's not in the national interest and I would say, for heaven's sake man, go."
Corbyn is now largely isolated in his own party after overwhelmingly losing a vote of no confidence in his leadership yesterday.
He is likely to soon face a formal leadership challenge from former shadow business secretary Angela Eagle or Labour's deputy leader Tom Watson.
The dark mood on the Labour benches was clear as Corbyn's questions to Cameron during PMQs today were met with a stony silence.
During the session, the prime minister also attacked Corbyn for not trying hard enough to win the EU referendum for the 'Remain' campaign. "I’d hate to see him when he’s not trying," Cameron told him.
The Brexit vote on Thursday was the trigger for a flood of resignations from Corbyn's shadow cabinet.
Despite the pressure, Corbyn has insisted he will not resign and will fight any leadership election.
"I was democratically elected leader of our party for a new kind of politics by 60% of Labour members and supporters," he said on Monday. "I will not betray them by resigning. Today’s vote by MPs has no constitutional legitimacy."
The mayhem on the Labour benches in the Commons has led to the SNP claiming it now forms the official opposition - because its Westminster leader Angus Robertson has the support of more MPs than Corbyn.