Boris Johnson is fighting to save him premiership as he awaits the publication of Sue Gray's "partygate" report which could determine his future.
The scandal-hit Prime Minister faces a make-or-break week as controversies mount and mutinous Tories consider whether to oust him from office.
Westminster is waiting with bated breath for the results of Sue Gray's probe into the Downing Street parties saga, which is expected to report any day.
The top civil servant has received written evidence from Mr Johnson's former aide Dominic Cummings, who has declared war on his former boss and urged Tory MPs to topple the PM.
Downing Street police officers on duty during alleged lockdown-flouting bashes are said to have given "extremely damning evidence" to Ms Gray.
Mr Johnson's former employer the Daily Telegraph - which he is said to refers to as his "real boss" - reported on Monday that he could be out of office within days.
A source told the paper: "Put it this way, if Boris Johnson is still Prime Minister by the end of the week, I’d be very surprised.”
The PM is facing a possible confidence vote from furious Tory MPs, as well as claims whips bullied rebels by threatening to cut off constituency funding if they failed to toe the line.
He is also embroiled in an Islamophobia row after Tory Nusrat Ghani alleged she had been told that she was sacked as a minister because of concerns about her "Muslimness".
All of this comes as families face a cost of living crisis, with growing unrest among top Tories about plans to hike National Insurance in April.
Here are the problems swirling around Boris Johnson as he faces a nightmare week.
Sue Gray's 'partygate' report
Top civil servant Sue Gray was brought in to lead an inquiry into multiple allegations of rule-breaking parties in Downing Street and Whitehall.
The Mirror broke the original story of the No10 Christmas party in December 2020, as well as a number of other bashes - prompting an outpouring of claims about lockdown-breaking gatherings.
Ms Gray has been interviewing current and former staff, police and senior ministers, including the PM about parties held during lockdown.
She is expected to provide Mr Johnson with her report a few hours before it is published. He is then due to make a statement to MPs.
A critical factor will be her findings on a BYOB drinks party in the Downing Street garden on May 20 2020, which Mr Johnson has admitted to attending briefly.
He claimed he believed it was a work event - but his former aide Dominic Cummings insisted he had been warned in advance it was against the rules.
If Mr Johnson is found to have misled Parliament on this issue, he will be in serious trouble.
Ministers who lie or mislead Parliament are usually expected to resign.
A no-confidence vote
Tory MPs have become openly mutinous in recent weeks, with several senior Conservatives calling on the PM to quit.
Angry backbenchers have been drawing up letters of no-confidence in his leadership, but it is unclear how many have been sent.
Some MPs are waiting to see the results of Sue Gray's report before they put their letters in.
Sir Graham Brady, the chairman of the Tory backbench 1922 Committee, is the only person who knows when enough letters have been submitted to trigger a confidence vote.
Under Tory rules, 15% of the parliamentary party must express no confidence in the leader for a vote to be held. The threshold is currently 54 MPs.
A secret ballot is then held of all Tory MPs, with 50% needing to vote in favour of ousting the leader for the vote to pass.
Theresa May ’s was held within hours of the requisite number of letters being received.
If the Tory leader wins, a confidence vote cannot be held again for a year.
Claims of bullying by Tory whips
Tory tensions boiled over last week when explosive claims of bullying by party whips emerged.
Senior Conservative William Wragg told Parliament that he had been informed of complaints of intimidation by some rebels, which he said amounted to "blackmail".
He urged colleagues to report these claims to the police. Mr Wragg is expected to meet officers this week to discuss the concerns.
No 10 has so far resisted investigating the claims.
Christian Wakeford, a Tory MP who defected to Labour last week, claimed he had been threatened with losing funding for a school in his constituency if he refused to back the Government in a vote on free school meals.
He named ex-Education Secretary Gavin Williamson as the culprit.
But Mr Williamson told the Times: "I don’t have any recollection of the conversation as described but what I do remember is working tirelessly with Christian and others in order to be able to deliver this school, which I did.
“Such major investment decisions are made after close analysis of the benefits that the investment will bring and certainly not something that can be decided in a brief conversation like the one described.
Islamophobia inquiry
Boris Johnson has ordered a Cabinet Office probe into claims by Tory Nusrat Ghani that she was sacked as a minister due to her Muslim faith.
The Wealden MP alleged that she was told she had been sacked as Transport Minister inn February 2020 because of concerns about her "Muslimness".
Chief Whip Mark Spencer, who identified himself as involved in her complaint, denied her claims, saying they were "completely false" and "defamatory".
A No 10 spokeswoman said: "The Prime Minister has asked the Cabinet Office to conduct an inquiry into the allegations made by Nusrat Ghani MP.
"At the time these allegations were first made, the Prime Minister recommended to her that she make a formal complain to CCHQ (Conservative Campaign Headquarters). She did not take up this offer.
"The Prime Minister has now asked officials to establish the facts about what happened.
"As he said at the time, the Prime Minister takes these claims very seriously."
An independent probe into Tory Islamophobia last year found that anti-Muslim sentiment "remains a problem" in Conservative ranks.
Mr Johnson refused to apologise for comparing Muslim women to "letterboxes" and "bank robbers" in articles before he was Prime Minister.
He told the review: "I do know that offence has been taken at things I’ve said, that people expect a person in my position to get things right, but in journalism you need to use language freely.
"I am obviously sorry for any offence taken. Would I use some of the offending language from my past writings today? Now that I am Prime Minister, I would not.”
Cost of living crisis
Amid all the political turmoil, Mr Johnson has been warned Tory votes will "evaporate" if planned tax hikes go ahead.
Former Cabinet Minister David Davis urged the Prime Minister to scrap the 1.25% increase to National Insurance in April, which comes as families face a cost of living crisis, with rising energy bills and soaring inflation.
Opposition is mounting among top Tories to the plan to raise NI contributions to fund health and social care, with one minister claiming the entire cabinet opposed the idea.
But Education Secretary Nadhim Zahawi insisted it was the right thing to do.
He said: "It is really important to just focus on why we are doing this, why I think it is the right thing to do, because it will finally create a system of adult social care that is sustainable and deliverable without breaking families."
