Live Video Coverage: Liz Truss first day on the job as UK prime minister with plenty of problems to solve.

LONDON (AP) — Liz Truss was set to become Britain’s next prime minister on Tuesday after arriving at Queen Elizabeth II’s Balmoral estate in Scotland, shortly after Boris Johnson met the monarch to formally offer his resignation.

The queen will ask Truss, the Conservative Party leader, during their audience to become Britain’s new leader as the country faces an acute cost-of-living crisis.

Truss, 47, takes office a day after the ruling party’s 172,000 members elected her as their leader, putting her in line to be named prime minister in Tuesday’s carefully choreographed ceremony at the queen’s summer residence.

Truss is expected to make her first speech Tuesday afternoon as leader of a nation of 67 million people anxious about soaring energy bills and a looming winter of recession and labor unrest. Those problems have festered for the past two months, because Johnson had no authority to make major policy decisions after announcing his plan to step down in early July.

This is the first time in the queen’s 70-year reign that the handover of power is taking place at Balmoral, rather than Buckingham Palace in London. The ceremony was moved to Scotland to provide certainty about the schedule because the 96-year-old queen has experienced problems getting around that have forced palace officials to make decisions about her travel on a day-to-day basis.

Speaking outside his Downing Street office before heading to Scotland, Johnson said his three-year tenure had left Britain with the economic strength to help people weather the energy crisis. He signed off with his typically colorful language.

“I am like one of those booster rockets that has fulfilled its function,” Johnson said. “I will now be gently re-entering the atmosphere and splashing down invisibly in some remote and obscure corner of the Pacific.’’

Johnson, 58, became prime minister three years ago after his predecessor, Theresa May, failed to deliver Britain’s departure from the European Union. Johnson later won an 80-seat majority in Parliament with the promise to “get Brexit done.”

But he was forced out of office by a series of scandals that culminated in the resignation of dozens of Cabinet secretaries and lower-level officials in early July. He alluded to that downfall in his leaving remarks, saying he was handing over the baton to Truss in “what has unexpectedly become a relay race.”

While many observers expect Johnson to attempt a political comeback, he offered Truss his backing and compared himself to Cincinnatus, the Roman dictator who relinquished power and returned to his farm to live in peace.

“Like Cincinnatus, I am returning to my plow,” he said. “And I will be offering this government nothing but the most fervent support.”

Speaking to Conservative party members on Monday, Truss promised to “deliver” on the economy, the energy crisis and the overstretched health care system, though she offered few specifics on her policies. On Sunday, Truss promised to unveil her plans for tackling the cost-of-living crisis within a week.

Bronwen Maddox, director of the international affairs think tank Chatham House, said Truss will have to say “an awful lot more” to reach the wider electorate.

“Everything, every road, comes back to cost of living at this point,” Maddox said. “And if she delivers, to use her word on that, then you might see the mood getting much more positive.”

Many people in Britain are still learning about the person who will soon be their leader.

Unlike Johnson, who made himself a media celebrity long before he became prime minister, Truss rose quietly through the Conservative ranks before she was named foreign secretary, one of the top Cabinet posts, just a year ago.

Truss is under pressure to spell out how she plans to help people and businesses struggling to pay energy bills that are due to rise next month to 3,500 pounds ($4,000) for the average household — triple the cost of a year ago.

During the leadership campaign, she promised help for people struggling to pay their bills, but declined to say what form the support would take.

The price spike, driven by Russia’s invasion of Ukraine and the aftershocks of COVID-19 and Brexit, has propelled U.K. inflation above 10% for the first time in four decades. The Bank of England forecasts it will hit 13.3% in October, and that the U.K. will tip into recession by the end of the year.

Train drivers, port staff, garbage collectors, postal workers and lawyers have all staged strikes to demand that pay increases keep pace with inflation, and millions more, from teachers to nurses, could walk out in the next few months.

Truss, a low-tax, small-government conservative, says her priority is cutting taxes and slashing regulations to fuel economic growth. Critics say that will further fuel inflation while failing to address the cost-of-living crisis. The uncertainty has rattled money markets, driving the pound as low as $1.15, its weakest performance against the dollar since the 1980s.

The first task for Truss will be to appoint a Cabinet to tackle the government’s mountain of challenges.

Kwasi Kwarteng, who was business secretary in Johnson’s government, is favorite to be named to the key job of Treasury chief. Like Truss, Kwarteng is a free-marketeer in the mold of 1980s Conservative Prime Minister Margaret Thatcher. But the scale of the economic crisis may mean he and Truss have to quash their small-state instincts and spend billions to help people pay their bills.

Writing in the Financial Times on Monday, Kwarteng said a Truss government would “take immediate action … to get families and businesses through this winter and the next.” He, too, did not supply any details.

In theory, Truss has time to make her mark: She doesn’t have to call a national election until 2024. But opinion polls already give the main opposition Labour Party a steady lead, and the worse the economy gets, the more pressure will grow.

Truss and her new Cabinet also face multiple foreign policy crises, including the war in Ukraine and frosty post-Brexit relations with the European Union.

As foreign secretary Truss was a firm supporter of Ukraine’s resistance to Russian invasion, and as prime minister she will continue the U.K.’s civilian and military support for Kyiv. She has said her first phone call with a world leader will be to President Volodymyr Zelenskyy.

She has also pledged to boost U.K. defense spending from just over 2% to 3% of gross domestic product — another expensive promise.

She’s likely to have much cooler conversations with EU leaders, who have been annoyed by Truss’s uncompromising stance as foreign secretary in talks over trade rules for Northern Ireland, an unresolved Brexit issue that has soured relations between London and Brussels. With the U.K. threatening to breach the legally binding divorce treaty, and the EU launching legal action in return, the dispute could escalate into a trade war between the U.K. and the 27-nation bloc.

Irish Foreign Minister Simon Coveney expressed hope that, once in power, Truss will adopt a more moderate approach.

“A lot of the key decision makers are trying to reach out and give a signal to Liz Truss that if she decides to change course to a more positive one in terms of trying to find a sensible compromise with the EU, that we can find a way forward on this issue,” he said.


Susie Blann contributed to this story.