David Cameron launched an extraordinary attack on Jeremy Corbyn during Prime Minister's Questions today, telling the Labour leader to step down.
Closing a series of muted exchanges between the pair, Cameron turned fire on Corbyn directly, appealing to him to leave for the sake of the country.
"It might be in my party's interest for him to sit there, but it's not in the national interest,” Cameron said. “For heaven's sake, go!"
The attack comes as Labour's leadership crisis continues into a fourth day.
Huge swathes of Labour's frontbench, shadow cabinet and parliamentary aides have quit since Sunday, with one - Labour's shadow education secretary - resigning today just 48 hours after being appointed.
Corbyn has, however, remained resolute.
After losing a vote of no confidence among his own MPs by 172 to 40 yesterday afternoon, the Labour leader said that he would not "betray" the Labour party members who elected him last year.
"Our people need Labour party members, trade unionists and MPs to unite behind my leadership at a critical time for our country," Corbyn said.