As Rishi Sunak starts his first full day as Prime Minister he is likely to face a huge number of challenges after taking over from Liz Truss who lasted just 49 days in office.
The new Prime Minister will be confronted with issues from the war between Ukraine and Russia to Nicola Sturgeon's call for another independence referendum.
Speaking during his maiden speech as PM he acknowledged there were a number of problems he had to address.
Sunak said: "Right now, our country is facing a profound economic crisis. The aftermath of Covid still lingers. Putin's war in Ukraine has destabilised energy markets and supply chains the world over.
"This government will have integrity, professionalism, and accountability at every level. Trust is earned and I will earn yours. I will always be grateful to Boris Johnson for his incredible achievements as prime minister. And I treasure his warmth and generosity of spirit.
"And I know he would agree that the mandate my party earned in 2019 is not the sole property of any one individual. It is a mandate that belongs to and unites all of us. And the heart of that mandate is our manifesto.
"I will deliver on its promise. A stronger NHS, better schools, safer streets, control of our borders, protecting our environment, supporting our Armed Forces, levelling up and building an economy that embraces the opportunities of Brexit, where businesses invest, innovate, and create jobs.
"I understand how difficult this moment is. After the billions of pounds it cost us to combat Covid, after all the dislocation that caused in the midst of a terrible war that must be seen successfully to its conclusions, I fully appreciate how hard things are."
Here are five challenges facing Sunak as he gets her premiership underway:
Cost of living crisis
By far the biggest issue facing Rishi Sunak as he walks into No 10 will be tackling the current cost of living crisis which was made worse by Liz Truss following her unfunded mini-budget.
With the inflation rate of 10.1 per cent the Office for National Statistics (ONS) said the cost of some of the cheapest food in supermarkets has risen by nearly two-thirds in the last year, heaping extra pressure on struggling households.
The fiscal statement, to be delivered by the Chancellor on October 31, is expected to address some of the issues however there will be cuts to public services and potentially rises in taxes.
If inflation continues to remain high then pressure will mount even more from the public and opposition parties on the call for a general election.
Scottish independence
First Minister Nicola Sturgeon was one of the first leaders to congratulate Sunak on becoming the new Conservative leader on Monday afternoon. She described him becoming the first Britain Asian Prime Minister as a "significant moment" for the country.
In a thread of tweets the SNP leader also said Sunak had no mandate in Scotland while she also called for independence. Sunak will have a lot on his plate in his first couple of weeks in Downing Street, and independence could become the biggest issue if the Supreme Court rules that Holyrood can hold a referendum without the consent of Westminster.
Boris Johnson and Liz Truss did not have a good relationship with the Scottish Government, therefore he may contact Sturgeon early on in an attempt to ease tensions.
Ukraine
Sunak is taking over when war still rumbles on in Ukraine with Russia plunging large parts of the country into darkness after attacking vital infrastructure.
Truss and Boris Johnson were both keen to support Volodymyr Zelenskyy in the fight against Vladimir Putin with regular calls between London and Kyiv. Expect Sunak's first calls as Prime Minister to a foreign leader to be to Zelenskyy to reaffirm the UK's support to Ukraine.
In the first weeks of her short premiership Truss committed the UK to continuing its support for Ukraine with another £2.3 billion next year. Zelenskyy will be keen to hear from Sunak if he is willing to keep that promise.
Out of control Conservative Party
One of Sunak's biggest problems will be to get an out of control Conservative Party on his side. Don't forget it was just seven weeks ago he was rejected by his party after it elected Liz Truss to take over from Boris Johnson in Downing Street.
He may have the majority of his own MPs on side but there are a number of bigger beasts in the party that won't allow him any honeymoon period.
What will get him on side early on is ruling out an early general election demanded by opposition parties.
Northern Ireland protocol
Parties in Northern Ireland have been given a deadline of Friday to form a power-sharing executive at Stormont. If no agreement is reached an election will be held on December 15.
The Democratic Unionist Party (DUP) said calling another election will not bring a resolution to the Northern Ireland Protocol dispute any closer.
Sunak will have to work with the parties to resolve the protocol issue, with the DUP leader Sir Jeffrey Donaldson saying his party was ready to fight an election if the Government calls one when a legislative deadline lapses on Friday.
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