LONDON -- blamed British Prime Minister Boris Johnson and other senior leaders for allowing boozy government parties that broke the U.K.'s COVID-19 lockdown rules, and while Johnson said he took "full responsibility" for the breach, he insisted he would not resign.

Revelations that Johnson and his staff repeatedly flouted restrictions they imposed on Britain in 2020 and 2021 have fueled outrage in the country and led to calls from opponents for Johnson to step down over the scandal known as 鈥減artygate.鈥

Most lawmakers in Johnson's governing Conservative Party have stood by him for now, and it's not yet clear if senior civil servant Sue Gray's much-anticipated report will change that.

Gray investigated 16 gatherings attended by Johnson and his staff while U.K. residents were barred from socializing, or even from visiting sick and dying relatives, because of coronavirus restrictions.

Gray's report concluded that the 鈥渟enior leadership team ... must bear responsibility鈥 for a culture that permitted events to take place that 鈥渟hould not have been allowed to happen.鈥

She said there had been 鈥渇ailures of leadership and judgment in No. 10,鈥 a reference to the prime minister's 10 Downing St. office.

鈥淭hose in the most junior positions attended gatherings at which their seniors were present, or indeed organized,鈥 she said.

A separate police investigation resulted in fines for 83 people -including Johnson - making him the first British prime minister found to have broken the law while in office.

JOHNSON 'HUMBLED'

Speaking to lawmakers after the report was published, Johnson said he took 鈥渇ull responsibility for everything that took place,鈥 adding he was sorry but insisting he did not knowingly break any rules. He said he was 鈥渉umbled鈥 and had 鈥渓earned a lesson鈥 but it was now time to 鈥渕ove on鈥 and focus on Britain's battered economy and the war in Ukraine.

Critics, some of them in the Conservative Party, have said Johnson lied to Parliament about the events. Ministers who knowingly mislead Parliament are expected to resign.

Johnson denied lying. He insisted that when he told Parliament last year no rules were broken and there were no parties, 鈥渋t was what I believed to be true.鈥

Johnson attended several events mentioned in Gray's report, including a June 2020 birthday party for which he was fined 50 pounds (US$63). He told a news conference: 鈥淚 believed that they were work events.鈥

British media and opposition politicians have found that hard to square with staff members' accounts of 鈥渂ring-your-own-booze鈥 parties and regular 鈥渨ine time Fridays鈥 in the Downing Street office amid the pandemic.

Keir Starmer, the leader of the opposition Labour Party, said Gray's report was a 鈥渃atalogue of criminality鈥 and that Johnson's government had 鈥渢reated the sacrifices of the British people with utter contempt.鈥

Gray's mandate did not allow her to mete out punishment. Much of her 37-page report is devoted to a detailed account of the events, including a May 2020 party in the Downing Street garden to which 鈥渢he Prime Minister brought cheese and wine from his flat鈥 and a party the next month at which 鈥渙ne individual was sick鈥 and 鈥渢here was a minor altercation between two other individuals.鈥

At another party held the night before the funeral of Queen Elizabeth II's husband, Prince Philip, revelers in the garden broke a swing belonging to Johnson's toddler son Wilf and partied until 4 a.m.

The report includes emails and WhatsApp messages suggesting that staff members knew they were breaking the rules. One invitation was changed from 鈥淲ine and Cheese Evening鈥 to 鈥淓nd of Year Meeting with Wine & Cheese.鈥 On another occasion, a staffer warned that journalists would be in the building for a news conference and people should avoid 鈥渨alking around waving bottles of wine.鈥

In measured civil service language, Gray slammed the behavior of those involved. She said there were 鈥渕ultiple examples of a lack of respect and poor treatment of security and cleaning staff,鈥 branding that 鈥渦nacceptable.鈥

鈥淢any will be dismayed that behavior of this kind took place on this scale at the heart of government,鈥 Gray wrote. 鈥淭he public have a right to expect the very highest standards of behavior in such places and clearly what happened fell well short of this.鈥

Johnson has clung to power despite the scandal, partly because Russia's invasion of Ukraine has diverted attention. Some Conservatives who considered seeking a no-confidence vote in their leader decided it would be rash to push Johnson out amid the war, which is destabilizing Europe and fueling a cost-of-living crisis.

Conservatives have tried to rebuff criticism by pointing out that Labour's Starmer also faces a police investigation for having a beer and a takeout curry with colleagues in April 2021. He insists the meal was part of a working day and broke no rules but has said he will resign if fined by police.

Now that Gray and the police have finished their investigations, Johnson's fate is in the hands of the Conservative Party, which has a history of throwing out leaders who become liabilities. Tory lawmakers say they have received angry messages from voters, and many are uncomfortable defending serial rule-breaking.

Johnson faces an inquiry by a House of Commons standards committee over whether he lied to Parliament. And Gray's conclusions could revive calls from Conservative lawmakers for a no-confidence vote in the leader who won them a big parliamentary majority just over two years ago. Under party rules, such a vote is triggered if 15% of party lawmakers - currently 54 - write letters calling for one.

If Johnson lost such a vote, he would be replaced as Conservative leader and prime minister. It's unclear how many letters have been submitted so far.

Conservative legislator Robert Jenrick said that 鈥渨ith a war in Europe, with an economic crisis â鈧¦ it is now time to turn a page鈥 and leave 鈥減artygate鈥 behind.

But another Conservative, Tobias Ellwood, said, 鈥淚've made my point and my position very clear to the prime minister: He does not have my support.鈥

鈥淏ut a question I humbly put to my colleagues is, `are you willing day in and day out to defend this behavior publicly?鈥'