Andy Burnham was sworn in as the United Kingdom’s new prime minister, taking over from the historically unpopular Keir Starmer.

The former Manchester mayor has taken the country’s top elected office just four weeks after entering parliament, having been floated as Starmer’s most likely successor since his premiership entered its existential danger phase earlier this year. Burnham became prime minister after a meeting with King Charles III in Buckingham Palace, as per U.K. procedure, shortly after the king accepted Starmer’s resignation. A statement from Buckingham Palace said the king had “requested him to form a new Administration.”