Andy Burnham officially became the United Kingdom’s new prime minister on Monday after succeeding Keir Starmer as leader of the governing Labour Party, making him the seventh British prime minister in a decade.

The former Greater Manchester mayor took office after Starmer resigned and formally handed over power following an audience with King Charles III at Buckingham Palace.

Here are five key things to know about Britain’s new leader:

1. He is a veteran Labour politician

Andy Burnham, 56, has spent more than two decades in frontline British politics. Before becoming prime minister, he served as the Mayor of Greater Manchester, a role he held since 2017.