Boris Johnson is to stand down as Conservative Party leader after losing the support of his ministers and MPs.
This summer will see a Conservative leadership race, and a new prime minister will be in office by the time of the party conference in October.
Mr. Johnson will remain in office as prime minister in the interim.
Following a series of resignations from the government against his leadership, he had vowed to “keep going,” but he has since made the decision to go.
Nadhim Zahawi, the chancellor, and other senior members of his government encouraged ham to step down and “leave with dignity.”
Later, Mr. Johnson is anticipated to deliver his resignation speech in front of No. 10 Downing Street.
Mr Johnson became prime minister in July 2019 after winning a Tory leadership contest, and went on to win an historic landslide general election victory five months after that.
He won the election vowing to “get Brexit done” but his government has been dogged by a series of controversies in recent months, not least a police investigation into parties in Downing Street during lockdown.
The revolt this week was triggered by revelations about the prime minister’s handling of sexual misconduct allegations against former Deputy Chief Whip Chris Pincher.
BBC political editor Chris Mason said Graham Brady, the chairman of the 1922 Committee of backbench Tory MPs, has met the prime minister to tell him he has lost the confidence of the party.