At the time, indoor social mixing was banned due to a spike in Covid-19 cases, and no more than two people were allowed to meet outside.
The new images have led to a renewed wave of outrage from opposition lawmakers, and from some colleagues in Johnson’s own Conservative party.
The November 13 party was said to be so cramped people were standing “shoulder to shoulder” and sitting “on each other’s laps,” according to a Downing Street official speaking anonymously to BBC Panorama.
“There were about 30 people if not more in a room. Everyone was stood shoulder to shoulder, some people on each other’s laps. (…),” the official said in the interview that aired on Tuesday. When asked to confirm that some attendees sat on each other’s laps, the official said “yes, one or two people.”
“The Prime Minister was on his way up to his flat and he came by to make a speech for Lee Cain [Johnson’s former director of communications]. He just wanted to thank Lee for all his work. He gave a little speech about it,” the official added.
“No, but I am sure that whatever happened, the guidance was followed and the rules were followed at all times,” Johnson replied.
Intentionally misleading the House of Commons is a breach of the British government’s ministerial code, and usually leads to a resignation.
Asked about Johnson telling Parliament that none of the lockdown rules had been broken, another official also anonymously told Panorama: “We were watching it all live and we’ve sort of looked at each other in disbelief like, ‘why? Why is he denying this?’ When we’ve been with him this entire time, we knew that the rules had been broken. We knew these parties happened. I mean, it is quite clear that he lied to Parliament. [The parties] were every week. The event invites for Friday press office drinks were just nailed into the diary.”
Pressed on whether there were weekly regular invites for press office drinks on Friday nights, that same official said: “Yes. Wine-time Fridays. Invites that were in everyone’s calendar for every Friday at 4pm.”
CNN has reached out to No 10 for comment on the BBC Panorama report.
Panorama had asked No 10 for an interview with Johnson or a senior member of the government but they declined, according to the program.
“Boris Johnson said repeatedly that he knew nothing about law-breaking — there’s no doubt now, he lied,” Labour Party deputy leader Angela Rayner said. “The Prime Minister has demeaned his office. He made the rules, and then broke them. The British people deserve better.”
Conservative MP Roger Gale wrote on Twitter: “I believe that the PM has misled the (House of Commons) from the despatch box. That is a resignation issue.”
The pictures have also led to scrutiny of the Metropolitan Police, whose own probe into Downing Street partying delayed Gray’s investigation, after officers decided not to fine Johnson for the event seen in the latest images.
Mayor of London Sadiq Khan told BBC Radio 4 on Tuesday it was important “police explain why they’ve reached the conclusions they have.” And former Conservative attorney general Dominic Grieve told the BBC that officers’ decision to clear Johnson for the event was “incomprehensible.”
But Downing Street told CNN the police had access to photographs and other evidence during their investigation. They added in a statement: “The Met have concluded their investigation and Sue Gray will publish her report in the coming days, at which point the Prime Minister will address Parliament in full.”
Johnson has previously apologized for the lockdown parties and has vowed to make changes to the Downing Street operation.
The scandal has tarnished Johnson’s standing in opinion polls and left his job security on a precipice for several months.
Conservative MPs have so far declined to trigger a vote of no confidence which, if passed, could force Johnson from office. But a disappointing set of local election results last month, and two difficult parliamentary by-elections scheduled for June, have maintained scrutiny on the UK PM’s leadership.
CNN’s Radina Gigova contributed reporting.