Boris Johnson has said he's appalled by the behaviour highlighted in the Sue Gray Parytgate probe.
The report, which looked into the Downing Street parties during Covid-19 lockdown, was published this morning.
Speaking after the release of the report during a press conference at No 10, Mr Johnson said: "I have been appalled by some of the behaviour, particularly in the treatment of the security and the cleaning staff."
++ SUE GRAY REPORT: FOR A FULL RUNDOWN OF WHAT WE KNOW SO FAR, CLICK HERE ++
Boris Johnson speaking during a press conference
GB News
He added: “And I would like to apologise to those members of staff.
“And I expect anyone who behaved in that way to apologise to them as well."
In his opening remarks during the press conference, Mr Johnson said: "Earlier today Sue Gray published her final report, which I commissioned to get to the bottom of things and set the record straight, and I’m grateful to her for her work.
"She has identified a number of failings, some official, some political, – and some that I accept are entirely my own, for which I take full responsibility.
"I want to start by saying that I am humbled by what happened, and I renew my wholehearted apology for the gathering in the Cabinet Room on the June 19 2020 - my birthday, for which I received a Fixed Penalty Notice.
"Now that Sue Gray has completed her inquiry and everyone can read her report, I want in all humility and without mitigating what has happened to offer a few points of context.
"10 Downing Street is not just my official residence but the headquarters of the Government, where hundreds of people work, and because they directly support the Prime Minister, the regulations allowed them to continue attending their offices for work purposes throughout the lockdowns.
Mr Johnson made a similar speech in the Commons earlier
House of Commons
"Sue Gray describes them as tight knit groups of officials and advisers who worked long hours under difficult conditions.
"These were the public servants who secured the PPE that saved many lives, established the biggest testing programme in Europe, and enabled the development and distribution of the vaccines that succeeded in protecting so many people.
"When some of these officials and advisers were leaving their jobs, I briefly attended gatherings to thank them for everything they had done because I believe that recognising achievement and preserving morale are essential duties of leadership.
"The police did not find my attendance at these occasions to be in breach of the rules, but they found otherwise in respect of some of those gatherings after I had left, or when I was not in the building.
"Downing Street and the Cabinet Office together have hundreds of rooms, and again I say this not in any way to extenuate my personal responsibility, but to give the context of these events.
"And I was appalled to learn that there have been 'multiple examples' in Sue Gray’s phrase of disrespectful and poor treatment of cleaning and security personnel, and this afternoon, I personally apologised to those dedicated members of staff for what happened.
"And I expect anyone who behaved in that way to do the same. As Sue Gray acknowledges, I have acted on her recommendations to make a series of changes.
"10 Downing Street now has its own Permanent Secretary charged with upholding the highest standards.
"I have appointed a new leadership team, including a new Chief of Staff and a new Principal Private Secretary and I have made it easier for any member of staff to voice any worries they may have and Sue Gray writes that she is reassured by this reform.
"And it is precisely because I have learned this lesson that I feel an even greater weight of responsibility to deliver on the priorities of the British people, and lead our country through some of the most challenging times in recent history.
"I will work every hour to ease the hardship caused by the rising cost of living, to protect our nation from the aftershocks of Covid, stand firm against Putin’s aggression, and to unite and level up across our United Kingdom, that is the mission that drives this Government and that is the mission that I will continue to pursue."
Following the release of the report, critics have once again urged for the PM to resign, including members of his own party.
While London Mayor Sadiq Khan said: “The findings of the Sue Gray report today confirm what many of us had long suspected – the abject failure of leadership and judgment at the heart of Government.
“At a time when millions of Londoners were being asked to make huge sacrifices – to stay away from loved ones and forgo funerals – No 10 and the cabinet office consistently and flagrantly held the public, and the rules they had been told to follow, in contempt.
“The British public deserve better and the PM should now demonstrate accountability for this culture of impunity which took place on his own doorstep and under his own roof.”