From a meeting with King Charles III to a phone call with U.S. President Donald Trump, here's what to know about Burnham's first day at the helm of Downing Street.

On Monday, 56-year-old Andrew Murray Burnham of the Labour party, better known as just Andy, will become Britain’s 59th prime minister | India News

Andy Burnham faces a daunting in-tray as Britain’s new prime minister, from a slowing economy and strained services to volatile global crises and US ties.

The United Kingdom's new Prime Minister Andy Burnham delivers a speech outside 10 Downing Street in London after taking office on Monday. [Isabel Infantes / REUTERS]

Andy Burnham promises unity and tangible improvements as he steps into the UK premiership amid pressing challenges and cabinet uncertainties.