London CNN  — 

A photo has emerged that appears to show British Prime Minister Boris Johnson drinking wine with Downing Street staff during the country’s first coronavirus lockdown last year.

The image, shared with British newspaper The Guardian, purports to show an outdoor gathering that took place on May 15, 2020. Staff can be seen gathered in the garden at Downing Street, which is also the Prime Minister’s residence.

Johnson is photographed with then-fiancée Carrie Symonds and two others seated at a table. On the table are bottles of wine and a cheeseboard.

Four other members of staff are sat around a second table. Nine people are then gathered closely together around a table on the grass, with another two sat on the ground nearby.

Social distancing restrictions at the time meant that mixing between households was limited to two people, who could only meet outdoors and at a distance of at least 2 meters (6.5 feet). In workplaces, guidance said in-person meetings should only take place if “absolutely necessary.”

On Sunday, a Downing Street spokesperson responded to the image, saying, “As we said last week, work meetings often take place in the Downing Street garden in the summer months. On this occasion there were staff meetings following a No. 10 press conference.”

“Downing Street is the Prime Minister’s home as well as his workplace. The Prime Minister’s wife lives in No. 10 and therefore also legitimately uses the garden.”

Deputy Prime Minister Dominic Raab said the photo shows a work meeting and followed Covid-19 rules in place at the time.

“This is a place of work, but it’s also the residence of the Prime Minister,” Raab told Sky News on Monday.

“And sometimes, as in many work situations, particularly given the pressures the No. 10 team were under, they might have a drink after the formal business has ended.

“That is not anything to do with the social mixing rules, and it’s consistent with the guidance at the time.”

The photo is the latest in a string of scandals surrounding Johnson in recent weeks. The British Prime Minister has been buffeted by multiple claims that social events were held inside 10 Downing Street in the runup to Christmas 2020, when the country was under coronavirus regulations that outlawed such activities.

Johnson has insisted that he believes no rules were broken, and has asked one of his top civil servants to investigate the alleged parties.

Following the emergence of the latest photograph, Labour Deputy Leader Angela Rayner tweeted: “Enough is enough. Tell us the truth about what was going on in Downing Street from the very beginning immediately @BorisJohnson.”

Senior civil servant Sue Gray has been tasked with investigating the reports following the removal of Cabinet Secretary Simon Case from the probe after it was revealed he had known about a quiz held in his department.

CNN’s Amy Cassidy and Luke McGee contributed reporting.