David Cameron is expected to face his first prime minister's questions (PMQs) since the UK voted to split from the EU and after announcing his intention to resign as Conservative leader in the wake of the referendum result.
The debate, scheduled for 12pm BST on Wednesday (29 June 2016), comes as the Brexit fallout continues, with Cameron returning from a Brussels summit. The prime minister reportedly urged EU leaders to give the UK more control over immigration – a top issue in the EU referendum campaign.
A spokesman for Jeremy Corbyn confirmed to IBTimes UK that the Labour leader would also be taking part in today's PMQs. The left-winger overwhelmingly lost a motion of no confidence from Labour MPs on Tuesday, but he has vowed to stay on as leader.
"I was democratically elected leader of our party for a new kind of politics by 60% of Labour members and supporters, and I will not betray them by resigning. Today's vote by MPs has no constitutional legitimacy," Corbyn declared.
"We are a democratic party, with a clear constitution. Our people need Labour party members, trade unionists and MPs to unite behind my leadership at a critical time for our country."
He is now expected to face former shadow business secretary Angela Eagle in another leadership election. Yvette Cooper, who came third behind Andy Burnham and Corbyn in Labour's last contest, has also failed to rule out making a bid for the leadership.
Meanwhile, the Conservatives have begun their own leadership election in the wake of Cameron's decision to step down. Nominations opened today and will close at noon on Thursday (30 June), with a new leader expected to be announced on 9 September. But before then, the candidates will be whittled down to two hopefuls by the Conservative parliamentary party.
Boris Johnson, the former Mayor of London behind the successful Vote Leave campaign, has been made favourite by the bookies, while Home Secretary Theresa May is expected to run and Work and Pensions Secretary Stephen Crabb has put his name in the hat.
Education Secretary Nicky Morgan is still considering launching a bid and Liam Fox, the Brexit backing former defence secretary, has so far failed to rule out a bid. Make to sure to follow PMQs updates at @IBTUKPolitics and you can watch the session live from 12pm BST at BBC Parliament, Sky News and Parliament TV.