By his own admission, Boris Johnson's mistakes 'are too numerous to list in full'.
But as Downing Street is engulfed by yet another lockdown party scandal with the Prime Minister at its heart, even his keenest Tory supporters are in 'despair'.
Mr Johnson's public and private life have been littered with lies, which saw him sacked as a journalist, fired by Tory leader Michael Howard over an affair and eventually thrown out by his wife Marina, who believed he was having an illicit relationship with Carrie Symonds.
His new wife Carrie has also been dragged into the mire, in the mess caused by the couple's controversial revamp of their Downing Street flat, complete with gold wallpaper, having accused Theresa May of making it a 'bit of a tip'.
And following his election as Tory leader, he was even accused of treason and accused of misleading the Queen over the prorogation of Parliament to force through Brexit after the Supreme Court ruled the move as 'unlawful' .
His own missteps and misinformation has also seen him apologise for a multitude of other errors, including saying Liverpudlians were 'hooked on grief' after Hillsborough.
Here is a list of his most infamous lies and controversies:
Parties at No 10
Boris Johnson seems unable to give a straight answer on allegations of multiple parties at No 10 throughout national lockdowns.
Labour deputy leader Angela Rayner said Mr Johnson's decision to swerve the confrontation - emulated by most Tory MPs - 'speaks volumes'.
In highly-charged scenes, MPs including the DUP's Jim Shannon and Labour's Afzal Khan spoke emotionally about their own bereavements during the pandemic and called for clarity on what had happened in No10.
Boris Johnson seems unable to give a straight answer on allegations of multiple parties at No 10 throughout national lockdowns.
A bombshell email revealed that the Prime Minister's Principal Private Secretary Martin Reynolds invited 100 Downing Street staff to the event in the No 10 garden at a time when lockdown rules meant all parties were illegal.
Mr Reynolds encouraged staff to 'bring your own booze' and 'make the most of the lovely weather' on May 20 2020.
Witnesses said the Prime Minister and his wife Carrie attended the event along with up to 40 officials.
It also threatened to place Mr Johnson at the centre of the alleged party culture in No 10, which is already being investigated by Whitehall ethics chief Sue Gray.
The PM yesterday did not deny attending the party, saying only: 'All that, as you know, is the subject of a proper investigation by Sue Gray.' Barrister Adam Wagner, an expert on Covid regulations, said that on the basis of what was known, the gathering was 'unlikely to be legal for attendees'.
He was branded a 'serial liar' by former attorney general Dominic Grieve, while Scottish Tory leader Douglas Ross said it would be 'utterly despicable' if he flouted rules, saying: 'The Prime Minister can settle this right now, he can tell people: was he at the party or not?'
The premier stood accused of going into 'hiding' after sending a junior minister to field an urgent question in the Commons this afternoon.
In highly charged scenes, MPs including the DUP's Jim Shannon and Labour's Afzal Khan spoke emotionally about their own bereavements during the pandemic and called for clarity on what had happened in No10.
Labour deputy leader Angela Rayner said Mr Johnson's decision to swerve the confrontation - emulated by most Tory MPs - 'speaks volumes'.
Mr Johnson is under growing pressure following a series of allegations of rule-breaking stories that are now being investigated.
A photograph emerged of Mr Johnson and his wife sitting with No 10 staff including Martin Reynolds on the terrace with a bottle of wine and cheese.
Downing Street has previously insisted that the photograph showed a work meeting.
There was also controversy following footage of No 10 staff laughing and joking about an event on December 19 2020.
In that video, the Prime Minister's then spokesperson Allegra Stratton suggested that there had been 'no social distancing' at the event, which staff jokingly referred to as a 'business meeting' with 'cheese and wine'.
Wallpapergate
Although the PM was yet again cleared of breaking the ministerial code over the 'wallpapergate' scandal by his sleaze watchdog Lord Geidt, he had to make a 'humble and sincere apology' for not giving him the crucial text messages months earlier.
Johnson faces sleaze claims after it emerged that he had helped advance a pet project of the Tory donor who paid for the Downing Street flat revamp.
The Prime Minister told Lord Brownlow he was looking into his idea for a new Great Exhibition - and soon afterwards the businessman had a meeting with the Culture Secretary to discuss it.
Mr Johnson mentioned the plan in a previously hidden WhatsApp conversation in which he also asked the peer for more money for the lavish redecoration of the No 11 living quarters - complaining that it was 'still a bit of a tip'.
Although the PM was yet again cleared of breaking the ministerial code over the 'wallpapergate' scandal by his sleaze watchdog Lord Geidt, he had to make a 'humble and sincere apology' for not giving him the crucial text messages months earlier.
The revelations about his promotion of the proposed event at the Royal Albert Hall - although it never went ahead - have prompted new accusations of 'cash for access'.
Mr Johnson and his now-wife Carrie had hired top interior designer Lulu Lytle to transform the 'John Lewis furniture nightmare' left by Theresa May in the PM's flat, using gold wallpaper costing £840 a roll.
A number of official probes were launched into the secret plans to get a charitable trust, funded by Conservative party donors, to pay for the upkeep of Downing Street including the flat.
Independent Adviser on Ministerial Interests Lord Geidt concluded in May that Mr Johnson had acted 'unwisely' by not finding out who was behind the renovation, but had not breached the ministerial code.
But his judgment was based on the PM's assurance that he had not known about the complex funding arrangements for the £112,549 refurbishment until February.
This was undermined last month when a separate Electoral Commission report revealed that Mr Johnson had in fact messaged Lord Brownlow in November 2020.
It prompted Lord Geidt to demand answers as to why he had not been told about the WhatsApp messages or the fact that the political funding watchdog had got hold of them.
In correspondence on the 'missing exchange' published by the Cabinet Office, Lord Geidt said it was 'plainly unsatisfactory' he had not been given all the relevant messages.
Downing Street's explanation was that the Prime Minister had to change his mobile phone after gossip newsletter Popbitch revealed that his number was publicly available online.
Misleading the Queen to shut down Parliament
The Prime Minister was accused of misleading the Queen over the prorogation of Parliament after the Supreme Court ruled the move as 'unlawful' in 2019.
In a devastating ruling, the 11 justices agreed unanimously that the five-week prorogation in the run-up to Brexit was 'void and of no effect'.
The judges refused to say if he had lied to the Queen - but many of Johnson's critics claim the ruling is tacit confirmation that he misled the monarch.
Mr Johnson is said to have called the Queen to personally apologise for embarrassing her after the Supreme Court ruled the prorogation of Parliament was unlawful.
A Downing Street source said Mr Johnson 'got on to the Queen as quickly as possible to say how sorry he was' after the ruling almost three years ago.
But later asked if he had lied to the monarch about his reasons for the suspension of Commons business, he replied: “Absolutely not.”
Under British law, a crime of disloyalty against the crown is known as high treason.
Regularly thought of as the most serious of offences, the charge is traditionally met with the severest sentencing possible as it is seen as threatening the state.
The usual punishment, up until the 19th century, was to be hung, drawn and quartered.
Forgetting whether or not he had ever taken cocaine
Boris Johnson has faced repeated questioning over his own drug-taking history in recent years.
The issue burst into life during the 2019 Tory leadership election which he went on to win, after it emerged that Michael Gove - now the Levelling Up Secretary - had taken cocaine.
Mr Johnson has admitted on several occasions to taking the drug at university.
In a 2005 appearance on Have I Got News For You he said he 'unsuccessfully' tried to take cocaine 'a long time ago' because he had sneezed.
Two years later, in 2007, he told GQ magazine he 'tried it at university' and 'remembered it vividly', adding: 'It achieved no pharmacological, psychotropical or any other effect on me whatsoever.'
But the remarks came back to haunt him as he sought the keys to number 10 in 2019. Asked about the GQ remarks by the Daily Mail he flailed before saying: 'I think the canonical account of this event when I was 19 has appeared many, many times.
'I think what most people in this country want us to focus on is what we can do for them and this great country.'
In the same election campaign he owned up to cycling on the pavement today as the 'naughtiest' thing he would admit to having done.
The Prime Minister, known as a keen cyclist who was mayor of London when the so-called Boris Bikes were introduced, apologised for having 'not always obeyed the law' for the leg-powered two-wheeled vehicles.
But pulled up on Sky over whether this was the naughtiest thing that he had ever done he insisted that he was agreeing with a caveat from interviewer Sophy Ridge that it not be something 'terminally politically damaging'.
His relationship with Jennifer Arcuri
Jennifer Arcuri has claimed that she and Boris Johnson had four-year affair while he was mayor of London.
Jennifer Arcuri has claimed that she and Boris Johnson had four-year affair while he was mayor of London.
She stated that she and Mr Johnson, who was Mayor of London at the time, began the affair during his second term in office when he was married to now ex-wife, high-flying barrister Marina Wheeler - with whom he shares two sons and two daughters.
At the time she received thousands of pounds of taxpayers' money in grants for her firms.
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