Plain clothes Met Police officers will prove they are no threat to women by FaceTiming uniformed supervisors - as the force tries to win back trust lost by killer cop Wayne Couzens.
Lone policemen will now show their warrant cards when approaching females on their own.
Scotland Yard say they will then demonstrate who they are and why they are there by video calling one of the force's police operations rooms.
They will show a uniformed supervisor will check who the officer is and state why they are there as well as provide recorded evidence of the encounter.
If the officer does not have their phone with them he will give then woman the number to call to carry out the verification procedure.
All of the operations rooms have now been set up with a dedicated mobile device to make and receive these calls that utilise a range of popular video calling services including FaceTime, WhatsApp, Skype, Zoom and Google Duo.
It is the latest move by the police to try and restore women's faith in the force after serving Met officer Couzens, 48, kidnapped, raped and murdered Sarah Everard.
The marketing executive, 33, was tricked into getting into his car in a fake arrest made possible by him being dressed in his uniform and showing his warrant card.
Police will be required to video call a control room to prove they are a legitimate officer
It comes in the wave of sadness and disgust over the police officer murder of Sarah Everard
Deputy Assistant Commissioner Laurence Taylor, Frontline Policing, said: 'It is very unusual for a lone plain-clothed officer to engage with a lone woman.
'It is simply not how we usually operate but there are some rare circumstances where this could happen and we want to give all the reassurance we can.
'We know we need to regain women's trust and we fully accept that the onus is on us to verify we are who we say we are and that we are acting appropriately - that's why we've introduced this system.
'We hope that being able to see and speak to a uniformed colleague in what will very visibly be a police operations room, and know that there is a proper police record of the encounter, will provide the reassurance that we understand is necessary.'
Women can also call 999 directly, to ask for verification of an officer's identification and reassurance from the police control room if they prefer this route - or if video calling is not available for any reason.
The Met said it set up this system after it consulted widely with key partners working to tackle violence against women and girls on this process in order to ensure it provides the reassurance that is needed.
Met Police Commissioner Cressida Dick has come under criticism over the force's advice
Serving Met Police officer Wayne Couzens kidnaped, raped and murdered Sarah Everard
Earlier this month the Prime Minister was forced to intervene to plead with the public to 'trust the police' .
Mr Johnson insisted the vast majority of officers across the UK were 'trustworthy' despite the sickening actions of Metropolitan Police constable Wayne Couzens.
Appearing on the BBC's Andrew Marr show at the start of the Conservative Party conference in Manchester over a week ago he said he wanted more action on crimes against women, and a greater number of rape convictions.
But he also backed controversial and criticised advice from the Metropolitan Police for women to flag down a passing bus if they are stopped by an officer they do not trust.
The advice issued in the wake of the Sarah Everard murder also included suggestions to shout, knock on doors or call 999, measures which were put to the Prime Minister.
He replied 'If you are suspicious about the way in which you are being treated by a police officer and you are worried for some reason, then clearly you should seek help in the way you have described.
'My view is that the police do - overwhelmingly - a wonderful job and what I want is the public, and women in particular, girls and young women, women of all ages, to trust the police.
'They are overwhelmingly trustworthy.'