Official Boris Johnson impersonators performed outside Downing Street hours after the PM apologised to the Queen for its latest rule-breaking party.
More than 100 copycat, many brandishing wine bottles, gathered at the gates of Downing Street to celebrate.
Earlier in the day, the Borises were seen at Trafalgar Square and on the Central Line of the London Underground.
This came as Downing Street apologised to the Queen for two illegal parties conducted in the building the day before Prince Philip's death.
The Queen had to wear a face mask to the ceremony, separating her from her family.
The discoveries came after weeks of accusations of parties at the prime minister's office during the pandemic.
Mr Johnson admitted earlier this week to attending a lockdown-breaking party in May 2020, mistaking it for a company event.
The party was organised by Jaackmaate, a prominent Norfolk-based Youtuber.
Fans reacted online, with singer Tom Grennan calling the prankster "a legend."
Number 10 apologised to the Palace for the parties conducted on the eve of the Duke of Edinburgh's death.