Sadiq Khan, the two-term center-left mayor of London, was poised on Saturday to become the first three-time winner of the job by a clearer margin than some of his supporters had predicted.
Mr. Khan, from the main opposition Labour Party, was initially elected to the post in 2016, becoming London’s first Muslim mayor, and would now become the first politician to win three consecutive terms since the role was created in 2000.
With the Labour Party well ahead in the opinion polls ahead of a looming general election, many analysts had expected Mr. Khan to cruise to a comfortable victory in a city that tends to lean to the left, but some saw the potential for an unexpectedly tight race against Susan Hall, representing Britain’s governing Conservative Party.
That prospect quickly faded on Saturday, with Mr. Khan’s party declaring victory and the BBC forecasting him as the winner after results from half of London’s regions showed the mayor exceeding his performance in his last election, in 2021.
“Sadiq Khan was absolutely the right candidate,” said Keir Starmer, leader of the Labour Party. “He has got two terms of delivery behind him and I am confident he has got another term of delivery in front of him.”
The vote itself took place on Thursday along with other local and mayoral elections in which the Conservatives, led by Britain’s embattled prime minister, Rishi Sunak, suffered a series of setbacks.
