The former Greater Manchester Mayor moved quickly to assemble his top team of ministers, mixing experienced returnees with fresh appointees following his formal assumption of office on Monday.
Burnham succeeded Sir Keir Starmer after the previous leader stepped down from the premiership, and wasted no time in outlining his vision for government.
In remarks delivered outside the official residence, the newly installed leader vowed to implement what he described as a fundamental reset for the nation and restore confidence in public institutions.
He committed to establishing an innovative approach to governance and economics, becoming the seventh person to occupy Downing Street since 2016.
The new Prime Minister acknowledged awareness that he was the sixth individual in a decade to traverse this pathway, the seventh occupant of the top job since 2016, describing it as a time for contemplation and renewed dedication.
He stated that political figures of his generation must elevate their performance and meet emerging demands.
Britain must demonstrate to the international community its capacity to re-establish composure and good order.
He reinforced his pledge to decentralise authority from the capital and provide citizens with greater agency over fundamental services, indicating plans to present a comprehensive decade-long strategy in the coming months.
The cabinet appointments reflected a balance of familiar figures and newcomers, with several portfolios changing hands.
The complete lineup includes John Healy as Chancellor, Ed Milliband leading foreign affairs, Shabana Mahmood overseeing the Home Office, and Louise Haigh combining responsibilities for the Duchy of Lancaster with First Secretary of State duties.
Yvette Cooper takes charge of health, Wes Streeting assumes defence, Pat McFadden handles work and pensions, and Angela Rayner leads on housing matters.
Matthew Pennycook serves as Housing Minister, Jonathan Reynolds oversees business, Lucy Powell leads education, Alex Norris takes justice, and Heidi Alexander continues in the transport role she held previously.
Lisa Nandy heads culture, Dame Angela Eagle leads on environmental issues, Miatra Fahnbulleh handles energy, and Hamish Falconer and Kanishka Narayan serve as Ministers of State, with Narayan specifically tasked with artificial intelligence matters.
Anneliese Midgley becomes Chief Whip, Emma Reynolds takes the Chief Secretary role, Bridget Phillipson handles women and equalities, Ellie Reeves serves as Attorney General, Alan Campbell leads the Commons, Baroness Smith of Basildon leads the Lords, Sir Chris Bryant handles Northern Ireland, Douglas Alexander takes Scotland, and Stephen Kinnock assumes the Wales portfolio.
Among those retaining their positions was Heidi Alexander, who continues as Transport Secretary.
The incoming leader set out his main objectives, which encompass expanding social housing provision, modernising the education system to better prepare young people for employment, and establishing what he termed a preventative approach that invests in helping individuals achieve their potential.
The Conservative leader wrote to Burnham calling for commitment to reducing public expenditure, rejecting any increases to taxation, and approving development permits for the Rosebank and Jackdaw fields in the North Sea.
She also pressed for reversal of the prohibition on new oil and gas extraction authorisations.
The Green Party leader urged the new Prime Minister to introduce rent restrictions, transfer water companies into public ownership, and implement taxes on accumulated wealth.
Following formal acceptance of the King’s invitation to govern during a private meeting, Burnham arrived at the official residence.
His predecessor departed after merely two years in the role, declaring the nation was now stronger and more equitable.
After delivering his address, the new leader was met with cheers and embraces from backers before proceeding inside accompanied by his spouse.
They were received by Cabinet Secretary Dame Antonia Romeo and warmly welcomed by Number 10 personnel.