Today marks six months since Rishi Sunak became Prime Minister after Liz Truss's disastrous 49-day spell in No10.
Speaking on the steps of Downing Street, he pledged his Government would have "integrity, professionalism and accountability" as he tried to reset after chaos under Boris Johnson and Ms Truss.
But since taking office he has been rocked by the dramatic departures of three cabinet members - Sir Gavin Williamson, Nadhim Zahawi and Dominic Raab, following criticism of their conduct.
In a major unforced error, Mr Sunak became only the second PM - after Boris Johnson - to be fined by police while in office after releasing a promotional video where he appeared to not be wearing a seatbelt.
He is also being investigated by Parliament's standards watchdogs for failing to tell MPs his wife owned shares in a childcare firm that benefitted from the Budget.
And the UK Statistics Agency wrote to the Government after he gave incorrect figures to the Commons about the asylum backlog.
Here we look at some of the PM's most difficult moments since his arrival at No10.
Police fine over failing to wear a seatbelt
On January 19 Mr Sunak scored a spectacular own goal when he filmed a video of himself speaking in the back of a car without a seatbelt.
The PM became the second Prime Minister in history found to have broken the law in office after Boris Johnson was fined for Partygate.
Mr Sunak - who has previously been given a fixed penalty notice over the Partygate scandal - was given another fine for his latest misdemeanour.
Downing Street said the PM had made a "brief error of judgement" by removing his seatbelt as he recorded a video to promote levelling up funding as he visited Lancashire.
He was criticised after uploading the footage to his official Instagram account, which has 1.3million followers.
Probe over wife's childcare shares
Earlier this month it emerged that Mr Sunak is being investigated by Parliament's standards watchdog after he failed to tell MPs his wife owned shares in a childcare firm boosted by the Budget.
The Parliamentary Commissioner for Standards, Daniel Greenberg, is probing whether the PM broke the MPs' code of conduct over the row.
Mr Greenberg's investigation, which was launched on Thursday last week and expanded today, centres around shares Akshata Murty holds in agency Koru Kids.
The company said on its website that the new incentives open to childminders - announced by Chancellor Jeremy Hunt last month - are "great”.
The Mirror previously reported that Mr Sunak failed to mention Ms Murthy's links to the company when he was questioned by MPs over why the private firms were set to benefit the most.
Downing Street has claimed rules were followed "to the letter", but critics said there are "serious questions" over benefits his family could get from Government actions.
Rapped for using misleading immigration figures
Last month The Mirror revealed that the UK Statistics Authority had written to the Government about misleading statements made by the PM over immigration.
Sir Robert Chote, who heads the authority, said remarks by the Prime Minister and Tory frontbenchers Sarah Dines and Robert Jenrick "do not reflect" Home Office figures.
He pointed out that the current backlog is currently over 166,000 - compared to under 20,000 when Labour left office, according to the government's own data.
On December 14, Mr Sunak told MPs that the current backlog is half the size from when Labour was in office.
Top Tory Nadhim Zahawi sacked over tax scandal
Another headache Mr Sunak could have done without was the Nadhim Zahawi tax affair, which led to the Tory chairman's sacking in January.
Mr Zahawi was thrown out of the cabinet for a "serious breach" of the ministerial code amid a major row over his tax affairs.
The top minister had come under intense pressure after it emerged that he had settled a multi-million tax dispute - including a penalty - with HMRC while he was Chancellor last summer.
In a letter to Mr Zahawi on Sunday, the Prime Minister said an ethics probe by his independent adviser had made it "clear there has been a serious breach of the ministerial code".
Mr Sunak, who was branded "weak" for failing to sack the Tory Chairman after details emerged in the press, finally said he had made the decision to "remove" Mr Zahawi from the Government.
The PM had attempted to defuse the sleaze row by ordering his ethics advisor Sir Laurie Magnus to launch a probe - only days after he told MPs that the matter had been resolved.
Dominic Raab finally quits in bullying probe as PM dithers
On Friday Mr Sunak's deputy, Dominic Raab, dramatically quit after months of pressure over bullying allegations.
The PM dithered for 24 hours before Mr Raab himself announced his departure as Deputy PM and Justice Secretary.
Number 10 declined to say whether the deputy PM was asked to resign, or whether he would otherwise have been sacked.
It came after a long-awaited report by top lawyer Adam Tolley was delivered to Downing Street following 15 allegations about Mr Raab's behaviour.
In a letter to the PM, Mr Raab said all but two of the claims had been dismissed, and bitterly wrote that ministers "must be able to give critical feedback" to officials.
It saves weak Mr Sunak a mammoth decision that was set to split the party, with critics branding his delay in acting a "farce".
Gavin Williamson's brief return to Cabinet
Another controversial appointment to Mr Sunak's cabinet was Sir Gavin Williamson, who was brought in as a Minister of State without Portfolio.
Before there was even time to work out what his job was and why he was there, Sir Gavin became embroiled in a bullying row, which included allegations he had told an aide to "slit your throat".
Sir Gavin faced claims of boasting he "owned" a Tory MP facing financial difficulty, allegedly telling a civil servant to "slit your throat”, and sent expletive-ridden messages to the party's ex-Chief Whip.
He eventually decided his position had become untenable and quit on November 8.
In a letter posted on Twitter, Sir Gavin said while he refuted the "characterisation" of claims against him, he recognised "these are becoming a distraction for the good work this government is doing".
The MP for South Staffordshire added he would comply with the complaints process and "clear my name of any wrongdoing".
Reappointing Suella Braverman days after she was sacked
One of Liz Truss's final acts as PM was casting Suella Braverman into the cold for a serious breach of ministerial rules.
She was booted out after it emerged she had sent an official document to a fellow MP from her personal email address - earning her the nickname 'Leaky Sue'.
Many expected the mistake to be costly, so it raised a lot of eyebrows when Mr Sunak brought her back into the fold after an exile of just SIX DAYS.
It sparked widespread disbelief, with shadow Home Secretary Yvette Cooper telling the Commons: "The prime minister promised us this would be a break from his predecessors, from the favour for mates culture... from the chaos... and instead the opposite has happened."
She's since been a divisive figure, coming under fire from former Tory chairwoman Baroness Sayeeda Warsi, who accused her of using "racist" rhetoric.
Asking homeless man if he was in business
Out-of-touch Mr Sunak was told by a homeless man "I just want to get through Christmas" as he spoke enthusiastically about his years in finance during an awkward exchange.
The millionaire PM was filmed asking the young man, named Dean, whether he works for a business - to which he responds: "No, I'm homeless."
Mr Sunak was branded "out of touch" after footage of the conversation - which happened as he visited a London shelter accompanied by a TV crew - was widely shared.
The Tory leader was filmed serving up plates of food to members of the city's homeless population when Dean opened up about his plight.
The young man told Mr Sunak he hoped to get temporary accommodation over the Christmas weekend.
'Pool party at Rishi's'
Environmental protestors wearing swimming trunks, flip flops and scuba diving gear lined up outside Mr Sunak's mansion waiting for a dip in his private heated pool.
Greenpeace activists formed a queue at the gates of the PM’s £2million Grade-II listed manor house in Richmond, Yorkshire in protest of his luxurious energy-draining pool.
It was revealed last month that Mr Sunak’s new £400,000 private heated pool is said to use so much energy that the local electricity grid to be upgraded.
Protestors said they wanted to highlight the “hypocrisy” of the UK’s richest ever Prime Minister, who has “failed to upgrade our outdated national grid, which remains unable to deliver the green energy revolution for the rest of us that would lower bills and help tackle the climate crisis”.
Sneaking out tax return revealing huge wealth
Multi-millionaire Mr Sunak has finally lifted the lid on his vast wealth as he published details of his tax affairs - months after first vowing to do so.
The summary, published on March 23, shows the Prime Minister's own income totalled over £1.9million in the financial year 2021-22 alone - with a staggering tax bill of £432,493.
His vast income includes £1.6million in capital gains from a single US-based investment fund, and almost £330,000 from interest on savings and dividends.
It also lists his salary from his role as MP and Prime Minister of £156,163.
But the timing of the publication was intriguing - as it happened while Boris Johnson was giving evidence to MPs over Partygate, and shortly after a vote on his Windsor Framework Brexit deal.
Mocked over cup of tea with Joe Biden
Mr Sunak was mocked after only getting to meet Joe Biden in the corner of a hotel bar over a cup of tea in Northern Ireland this month.
It is far from a formal bilateral meeting progressing a UK-US free trade deal, which many had hoped for during President Biden's visit.
Critics blasted the meeting for not lasting "long enough for biscuits to be served" - let alone to discuss US-UK relations, while a US official dubbed the gathering as a “bi-latte”.
A spokesperson for the Liberal Democrats said: "This had been billed as an opportunity for the PM to hobnob with Biden - but it turned out their coffee didn't even last long enough for biscuits to be served."
Police step in after the Sunaks dog let off lead
Mr Sunak faced fresh embarrassment last month after he and his family were spoken to by police for breaking the rules while walking his dog in a Royal Park.
The PM's close protection officers had to step in after the PM's labrador Nova was allowed to run free in Hyde Park in London on Saturday.
The dog was filmed off its lead - just yards from a sign telling owners not to do so.
It comes after Mr Sunak was fined by the police in January for failing to wear a seatbelt in a car and he was fined last year for attending a lockdown-busting gathering in No10.
The Met Police told the Mirror a woman had been spoken to about the latest rule-breaking.
The force said in a statement: "We are aware of a video showing a dog being walked off the lead in Hyde Park.
"An officer, who was present at the time, spoke to a woman and reminded her of the rules. The dog was put back on the lead."
Elderly patient confronts PM over nurses' pay
Mr Sunak was confronted by a 77-year-old NHS patient telling him he needs to "try harder" in a bruising encounter over nurses' pay.
In first visit since becoming Prime Minister, Mr Sunak was told by Londoner Catherine Poole: "You need to pay them."
The comments from Ms Poole, who is recovering from surgery at Croydon University Hospital, came as Mr Sunak also dodged a reporter's questions on nurses' pay.
As Mr Sunak crouched down to have a word with the 77-year-old patient, she could be heard giving Mr Sunak a short lecture over pay for nurses facing a real-terms cut.
The Prime Minister, wearing a mask, said the Government was trying, but she insisted: "You are not trying, you need to try harder."
Mr Sunak went on to say that the NHS was important and Ms Poole replied: "Yes, and look after it."
Levelling up constituency cash backlash
Mr Sunak had to go on the defensive after a massive £2.1 billion of levelling-up cash was distributed in January.
Despite some of England's most deprived areas missing out, a bid for cash in his wealthy constituency got the thumbs up.
Damning evidence by research group the Centre for Inequality and Levelling Up found that in the two funding rounds so far, a quarter of England's 100 most deprived areas have received no cash at all.
There was fury in Rochdale, the 17th most deprived area in the country, after a £40 million funding bid was scrapped - sparking allegations that Tory areas were prioritised.
To pile further pressure on the PM, a bid in his own Richmond constituency in North Yorkshire - which is in the 251st most deprived area out of 317 in the country - was awarded £19 million.
Other affluent areas also awarded cash included Rutland, the 15th least deprived, which was given nearly £22 million.
Even Mr Sunak's own party are far from happy, with insiders branding it a "f**k up of epic proportions".
