New police technology to help to visualise bruising in darker skin
Sir Sadiq Khan said the device developed by the Metropolitan Police was an example of 'how much the police has changed in the last few years'.
The devices, known as Project Archway, allow officers to better assess victims' injuries, particularly on darker skin, by making it easier to photograph and visualise bruising.
The mayor was shown the new technology on Monday and spoke with Met Commissioner Sir Mark Rowley and officers who are piloting the devices.
The handheld device is the first of its kind to be developed and uses a technique called cross-polarisation to make injuries clearer that may not appear to the naked eye.
Of 33 uses during a pilot in south London, 45% have resulted in charges, with several others under investigation, the Met Police said.
The device has undergone ethical scrutiny and wide consultation, including input from the Crown Prosecution Service (CPS), Black Police Association, and the Met Ethics Board. Officers are specially trained prior to use and can only use the device with full consent from victims.
Alongside the force's V100 programme, which targets the most dangerous offenders and has already resulted in 129 convictions and 154 serious charges, the technology is part of efforts to tackle violence against women and girls, following the publication of its three-year progress report on Tuesday.
Sir Sadiq said that police were responding to the concerns of victims of colour.
He said: 'I completely understand why ethnic minority and women Londoners have had less confidence in the police service and one of the missions of the police service with my support – and challenge – is to make sure we address the concerns that those Londoners have.
'I think what today shows is just how much the police has changed, and is responding to a legitimate concern raised by victims and survivors, particularly ethnic minority victims and survivors.'
Sir Sadiq added: 'It's really important to acknowledge the progress made. Similarly, the response last week from the Met Police Service and the commissioner to the hearing into Child Q is significant; a recognition of the systemic issues last week from the police service. That wouldn't have been the case a few years ago.'
Two Metropolitan Police officers were sacked last week after they were found to have committed gross misconduct during the 'disproportionate' strip search of a 15-year-old black girl at school, who was wrongly suspected of carrying cannabis.
Commander Kevin Southworth said while the officers involved did not act correctly, there were organisational failings with training around strip-searches said to be 'inadequate' and oversight of the power 'severely lacking'.
Sir Sadiq said that while impressive, the new technology and work to help victims of colour did not been there was not more work to be done.
Sir Sadiq said: 'It's not mission accomplished. Neither myself nor the commissioner are complacent about the need for further reform, about the need for further work, about the need to win over those Londoners who still aren't sure about the Met Police Service.'
He called for work to tackle misogyny to begin in schools and for it to be classed as a hate crime by Parliament.
Sir Sadiq added: 'We need to recognise that ending the violence against women and girls, ending misogyny, can't start and stop with the police. It needs a whole society approach. It's really important that employers understand the concerns the female staff have, but also pubs, bars, music venues, music festivals need to be safe for women and girls. There's responsibility for us as men to provide allyship to women and girls.
'There is a role for the criminal justice system to do far better. It can't be right in 2025 in one of the most progressive countries in the world, if you're a woman or a girl, you're scared to go out.'
Sir Mark said the force was improving its response to victims of violence against women and girls.
He told the PA news agency: 'This new technology is just one example of how we're day-by-day improving our response to victims of violence against women and girls.
'A very basic requirement is to be able to get great evidence of an assault, that might be a bruise or a scratch.
'It's not always easy to photograph it. It depends on the light, depends on a whole range of factors. It also sometimes depends on the colour of skin – darker skin sometimes showing bruising less readily.
'Recognising this problem, our forensic experts have designed this special lighting technology.'
He said the tests had resulted in more prosecutions and that he wanted it to be expanded to the rest of London and in future, the country.

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A police officer sits in a car outside the entrance of the Britannia Hotel in Canary Wharf A police cordon and fencing is placed outside the Britannia International Hotel this morning A person waves an English flag from a car as it passes the Britannia International Hotel in Canary Wharf One placard brought by a group of protesters said: 'This is a peaceful protest to protect our own.' Amid warnings 'discontent is real' in Britain, Met Police officers were called to the Britannia International Hotel, on Marsh Wall, Canary Wharf Furious hotel guests have left damning reviews online, claiming they were told their stays were 'cancelled' Police officers gather in front of counter-protesters outside the Canary Wharf hotel Essex Police has faced major questions after footage emerged of officers escorting pro-migrant activists to the hotel - despite the force initially denying this has happened. Reform UK leader Nigel Farage posted footage allegedly showing pro-migrant protesters being 'bussed' to the demonstration in police vans but Essex Police said this was 'categorically' untrue. However, after footage emerged of cops leading pro-migrant activists to the hotel by foot, Essex police admitted its officers had escorted the protesters. Farage had called for Chief Constable Ben-Julian Harrington to quit, saying it was 'absolutely disgraceful' and 'heads must roll'. But Chief Constable Harrington rejected claims his officers had given a higher level of protection to pro-migrant protesters. He said: 'The only protection that officers are doing is to those lawful and law-abiding people, whether they are in that accommodation, whether they are the people of Epping or whether they are people who are standing there with placards and banners wishing to make a very important and legitimate view, whichever your views about it. 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