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.
More top news
Doctors cannot explain it but the extraordinary bond between new mum Holli Cheung and her son Jordan may have saved her life.
David Cameron has begun a whirlwind tour of Europe to discuss his terms for renegotiating the UK's membership of the EU with key leaders.
Through the rest of today showers will continue across many northern areas, whereas for much of England and Wales it'll stay largely dry.