30 officers of the Metropolitan Police have been assigned to investigate how details of the police records of the dispute between Mr Mitchell and a member of the Diplomatic Protection Group came to be published in two national newspapers. Those investigating have asked 800 members of the DSG to confirm whether or not they were on duty at the time of the incident.
As part of an investigation by The Independent Police Complaints Commission, one officer of the DPG, who was not on duty at the time, was arrested last month on suspicion of misconduct in a public office. The officer said that he had witnessed the incident, a claim which was later questioned after CCTV footage was released that cast doubt on the original police account.
In Sept 2012 Andrew Mitchell was rude and possibly insulting to a member of the DSG, including allegedly calling him a “pleb” as he tried to leave Downing Street through the main gate on his bicycle and was asked to dismount and use the pedestrian gate.
Five weeks later following pressure from fellow MPs and the media, Mr Mitchell resigned from his position as chief whip of the Conservative Party.