A police officer who faced investigation over the Plebgate row has kept his job after a disciplinary hearing cleared him of any wrongdoing.
James Addison, 37, was accused of making a false statement denying he had been in contact with Pc Keith Wallis, who was later jailed and sacked for pretending to have witnessed the confrontation.
However, Addison faces a second disciplinary hearing next month after admitting sending porn to colleagues via Whatsapp while on duty at Downing Street.
He has already been fined £6,000 over sharing the "disgusting and offensive" images that included bizarre sex acts.
Pc Susan Johnson been sacked from the Metropolitan Police after a gross misconduct case against her was found to be proven following the investigation into the "plebgate" row on Downing Street between officers and former chief whip Andrew Mitchell, the force said.
Former Cabinet minister Andrew Mitchell has demanded the Metropolitan Police release full transcripts of the hearings investigating officers over the Plebgate scandal.
Writing to police chief Sir Bernard Hogan-Howe, the Conservative MP said that "confidence in the police has been badly damaged by the many revelations that have emerged", and that "only a completely open and transparent account of what happened will remedy the damage done."
The Metropolitan Police today confirmed they had received the letter, and were seeking legal advice as to what information could be published.
A policewoman involved in the Plebgate row on Downing Street between officers and former chief whip Andrew Mitchell boasted to a friend that she could bring down the Government, the Conservative MP has said.
Mitchell made the claim after Scotland Yard denied his requests to release information heard in gross misconduct hearings relating to the scandal.
Mitchell said full disclosure of Metropolitan Police gross misconduct hearings will show the woman texted a friend two days after the altercation saying: "I can topple the Tory Government".
Pc Gillian Weatherley has been dismissed from the Metropolitan Police without notice after she was found guilty of gross misconduct.
She was on duty in Downing Street on the day of the confrontation between then-chief whip Andrew Mitchell and fellow constable Toby Rowland in September 2012.
The next day, Weatherley sent a photograph of an email that Rowland had sent to his bosses about the row to another officer, James Glanville. He was later sacked for leaking the information to the Sun newspaper.
The force said she had given "inaccurate and misleading" statements to officers investigating the aftermath of the row, and had been suspended from duty since her arrest in February last year. Prosecutors have already decided not to press charges.
Pc Gillian Weatherley has been sacked from the Metropolitan Police Service over leaks to the press during the Andrew Mitchell "plebgate" row, the force has announced.
In a statement, the Metropolitan Police revealed that Andrew Mitchell attended both misconduct hearings for former Pcs Keith Wallis and James Glanville, as an "interested party".
The Met spokesperson said: "Misconduct hearings are considered a privateprocess. As such, we treat theinformation raised within them as confidential.
"This is set out in the statutory regulations governing police misconduct proceedings. However, given the public interest in this investigation the MPS, will publicise the outcomes of the hearings."
Andrew Mitchell, then chief whip, was involved in a heated confrontation with another police officer, Toby Rowland, after he was refused permission to cycle through the main gate of Downing Street on September 19, 2012.
Mr Mitchell, who was accused of calling the officer a ''pleb'', was forced to resign his post following a month of intense media interest in the story.
The Metropolitan Police has also announced that a second officer has been dismissed following their involvement in the 'plebgate' scandal.
James Glanville, who was a serving PC in the Diplomatic Protection Group, was arrested in January last year. He was later told he would face no criminal action but the police watchdog (IPCC) and the force agreed their was a case to answer for gross misconduct.
Granville was not on duty at the time of the 'plebgate' incident, but investigations found that later that evening he passed information about the incident to the Sun newspaper.
He later provided the newspaper a photo of PC Toby Rowland's email that he sent to his supervisors, which he got from another colleague who had been on duty at Downing Street that night. He subsequently lied about his actions in statements given to detectives from the Alice team.
A police officer who was jailed for 12 months after pleading guilty to a charge of misconduct in public office over the 'plebgate' scandal has been dismissed by the Metropolitan Police.
Wallis, 53, falsely claimed in an email that he had witnessed an incident in Downing Street involving the former Chief Whip Andrew Mitchell and other officers in September 2012.
A former policeman at the centre of the "plebgate" row has said officers on duty at the gates of Downing Street have been "betrayed" by their Metropolitan Police bosses.
Ian Richardson said he believes his colleagues' claims that Andrew Mitchell called officers "plebs" and was "officious and rude", in an interview with The Times.
Despite not hearing the exchange, Mr Richardson said Pc Toby Rowland, the officer who claims he was sworn at by Mr Mitchell, immediately recounted what was allegedly said.
Mitchell, the Conservative MP for Sutton Coldfield, admits swearing at the officers but maintains that he did not use the other words attributed.
Mr Richardson accused the Metropolitan Police of failing the officers involved by concentrating on who leaked the story to the media rather than investigating what had happened and issuing a statement to clarify the incident.
The former officer, who retired with 30 years' service in October 2012, said Mr Mitchell should not have lost his job over a "quirky incident that should have blown over".