A picture emerged in December 2021 showing the Prime Minister, his wife and about 15 members of staff enjoying wine and cheese in the garden of Downing Street.
Number 10, Mr Johnson and Dominic Raab all claimed this was a work event and did not break the rules.
Dominic Cummings claimed that the photo did not show a party, but that one had taken place five days later.
May 20: ‘Bring your own booze’ garden drinks
Martin Reynolds, the Prime Minister’s private secretary, sent an email to more than 100 Downing Street staff, inviting them to make the most of the good weather by coming to the garden, and to bring their own booze.
Reports have claimed that roughly 40 people attended the gathering, including the Johnsons.
The legality of the gathering is now part of the investigation of Ms Gray.
June 19: A ‘birthday party’ for Boris Johnson
A birthday party was held in Boris Johnson’s honour on his 56th birthday despite social gatherings indoors being banned.
The event took place around 2pm with a birthday cake presented to the Prime Minister and attendees singing “happy birthday”, ITV News reported.
Mr Johnson attended the event, a Number 10 spokesman confirmed, but insisted the Prime Minister was there for less than 10 minutes and that staff gathered “briefly” for the event.
Pubs and restaurants were shut at the time, while indoor gatherings were prohibited altogether and Britons were only allowed to meet in groups of six.
November 5: New lockdown rules imposed
After opening up in the summer, rising cases led to further restrictions returning.
Guidance stated that people must stay at home unless for work (where you couldn’t work from home), education, essential activities and emergencies.
Indoor gatherings with other households were also banned.