He attended an event in November 2020 where he was snapped with alcohol. The Met has been asked to justify actions with regards to events held in December 2020 and January 2021.

Brian Paddick, former Met police chief is in a group which claims the Met acted irrationally during its investigation. His lawyers want to judicially review the apparent failures of the Met to adequately investigate the prime minister’s participation in three unlawful gatherings.

The Met is being sent a letter before legal action, and will have 14 days to respond, according to the Guardian.

The legal letter says it does not understand why some attendees were investigated and fined but not the prime minister, and asks the Met to either reopen its investigation, or justify in writing its decision-making, or face court action.

Acting Met commissioner, Sir Stephen House, is due to appear before the policing and crime committee today where he could be quizzed about the Met investigation into partygate.