A Police Constable was sacked and put behind bars after he was found guilty of sex assaults and voyeurism.
He will also remain on the sex offenders register for life and was formally dismissed from the Metropolitan Police Service after a Special Case Misconduct Hearing, held on Wednesday (June 14.)
Assistant Commissioner Martin Hewitt, chair of the special case hearing, said: "Le Mansois-Field abused the trust the victim placed in him because he was a police officer, which makes this offence all the more appalling.
"The public rightly demand and expect that their police officers act with integrity at all times.
"This behaviour damages the public's trust in the police and it is absolutely right that he was convicted at court and dismissed from the service."
PC was paid during his suspension
Le Mansois-Field had been suspended from duty since February 2015, but his pay was only halted following his conviction.
He was found guilty of sexual assault by penetration, a second count of sexual assault and voyeurism and four and-a-half years' imprisonment at Reading Crown Court on Friday April 21.
His sentences, that are running concurrently, related to an incident at an address near Reading, Berkshire, on January 31 2015.
For his actions, the officer had a case to answer for in relation to an alleged breach in the Standards of Professionalism in terms of "discreditable conduct".
The Chair found the allegations proven for the officer and that PC Le Mansois-Field had breached the standards of professional behaviour in such a serious way that it amounted to gross misconduct.
The Chair determined that the only appropriate sanction was dismissal without notice.
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