A Metropolitan Police officer will be sentenced today after pleading guilty to a charge of misconduct in public office over the "plebgate" scandal.
Pc Keith 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.
Last month, his offer to resign from the force was rejected by Scotland Yard, who said in a statement: "The deputy commissioner has refused to accept Pc Wallis's resignation and he will face a misconduct board in the coming weeks."
The ripples from Andrew Mitchell's short, bad tempered altercation at the Downing Street gate continue to spread.
ITV News has learned that the police watchdog has temporarily suspended its investigation into three police union representatives over their meeting with Mr Mitchell.
The officers from Mr Mitchell's local Police Federation branches gave an account of a meeting with him about the 'Plebgate' affair, which appeared to contradict a recording Andrew Mitchell made of the meeting.
The Independent Police Complaints Commission launched an investigation into the men after they appeared in front of the Home Affairs Select Committee. But the Federation then initiated legal proceedings saying the men had already been investigated and cleared.
The Federation took out an injunction against the IPCC investigation while a Judicial Review is heard. An IPCC source says it will not harm their investigation to wait for the outcome of the review and so they are not contesting the injunction.
An IPCC spokesman said: "We deeply regret the delay in concluding a matter of great public interest.
"However, as there would be no prejudice to our investigation if it is suspended pending the outcome of proceedings we do not wish to incur unnecessary costs from the public purse in fighting the interim application.
"As a result, we will not be in a position to complete our investigation pending the conclusion of this legal action."
A police constable caught up in the 'plebgate' row has had his resignation offer rejected by Scotland Yard.
Pc Keith Wallis could face a jail term after admitting that he pretended to witness a confrontation between MP Andrew Mitchell, who was then chief whip, and officers in Downing Street.
When Wallis entered a guilty plea to misconduct in a public office earlier this month, it also emerged that he had offered to resign.
But Scotland Yard said: "Pc Keith Wallis has made an application to resign from the Metropolitan Police Service. In line with police regulations the deputy commissioner has the right to refuse the resignation of an officer who has been suspended.
"The deputy commissioner has refused to accept Pc Wallis's resignation and he will face a misconduct board in the coming weeks."
Mr Wallis is due to be sentenced on February 6 and he will then face being sacked.
Mr Vaz said it was "essential" trust between the federation and the public was restored.
However, he empathised with members of the public who felt let down by the police as he expressed some dismay that the "only people not to apologise" for "Plebgate" were the Police Federation.
A Metropolitan Police officer has pleaded guilty to a charge of misconduct in public office over the "plebgate" scandal.Read the full story ›
The Sun's Political Editor Tom Newton Dunn, who broke the original 'plebgate' story, has claimed the police officer's admission today to falsifying witnessing the row, was merely "a red herring to the main event": the Downing Street PC who alleged Andrew Mitchell called him a "pleb".
Worth remembering Keith Wallis's part in #Plebgate came a day after the row at gates. So a red herring to main event; if Mitchell said pleb.
Also worth remembering PC Toby Rowland, who made 'pleb' allegation, has been fully vindicated by Met/CPS/IPCC, + he is still suing Mitchell.
A Sun spokesman said: "We stand by our story and will defend Mr Mitchell's claim vigorously".
Mr Mitchell is suing the paper for libel.
In a statement, he said: "I am pleased that justice has been done in a criminal court today....I am looking forward to seeing justice done in the up to 10 other related disciplinary cases involving police officers"
Former Chief Whip Andrew Mitchell was in his constituency after a police officer admitted to falsely claiming to have witnessed the 'plebgate' row.
He had earlier issued a statement saying: "It is very sad and worrying for all of us that a serving police officer should have behaved in this way."
Andrew Mitchell declined to comment to awaiting reporters on the news a police officer has pleaded guilty to misconduct over the "plebgate" scandal during his visit to his Sutton Coldfield constituency.
Mr Mitchell told them: "I hope you're enjoying visiting my constituency."
Senior MPs on both sides of the green benches for Andrew Mitchell to be reappointed to the Cabinet after a police officer admitting to falsely claiming to have witnessed the 'plebgate' row between the former Chief Whip and officers:
Delighted Andrew Mitchell vindicated after long and tough time fighting against system. Must never again - to cab minister or anyone
Vindication for Andrew Mitchell: http://t.co/NmESBOn5Lm I sincerely hope he is re-appointed to the Cabinet.
David Cameron said it was "completely unacceptable" for a police officer to falsify their account of an incident after PC Keith Wallis pleaded guilty to misconduct in public office over the "plebgate" affair.
The Prime Minister said: “It is completely unacceptable for a serving police officer to falsify an account of any incident.
"Andrew Mitchell has consistently denied the version of events presented in the email and I welcome the fact that the officer concerned has now pleaded guilty.”