Andy Burnham has been officially appointed as the new Prime Minister of the UK and has wasted no time in getting to work, with a new Cabinet announced and a bold speech delivered on his first day in office

Andy Burnham will become Britain's next prime minister on Monday, with huge challenges and opportunities.

The United Kingdom's new prime minister, Labour's Andy Burnham, began shaping his government with a cabinet reshuffle and a series of socially oriented announcements, hours after…

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]

The Makerfield MP is expected to take office on Monday

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