Prime Minister Boris Johnson announced his resignation Thursday amid a mass revolt by top members of his government, marking an end to three tumultuous years in power in which he brazenly bent and sometimes broke the rules of British politics.

Months of defiance ended almost with a shrug as Johnson stood in 10 Downing Street and conceded that his party wanted him gone.

“Them’s the breaks,” he said.

The brash, 58-year-old politician who took Britain out of the European Union and steered it through COVID-19 and the war in Ukraine was brought down by one scandal too many — this one involving his appointment of a politician who had been accused of sexual misconduct.

The messiest of prime ministers did not leave cleanly. Johnson stepped down immediately as Conservative Party leader but said he would remain as prime minister until the party chooses his successor. The timetable for that process will be announced next week, he said.

But many in the party want him gone before then, and his government has been shredded by scores of resignations.

Among the possible candidates to succeed him: former Health Secretary Sajid Javid, former Treasury chief Rishi Sunak, Foreign Secretary Liz Truss and Defense Secretary Ben Wallace.