The Metropolitan Police employ a team of “super-recognisers”, people who are preternaturally able to memorise and recognise faces. They’re aided by the uniquity of CCTV cameras in the UK:

“By some estimates, as many as a million CCTV cameras are installed in London, making it the most surveilled metropolis on the planet. Boris Johnson, who before becoming Britain’s Foreign Secretary served as the city’s mayor, once said, ‘When you walk down the streets of London, you are a movie star. You are being filmed by more cameras than you can possibly imagine.’

“James Rabbett pointed out to me that whereas in Britain people live with the knowledge that ‘ninety per cent of their day’ is captured on camera, ‘a lot of other countries have issues with human rights and that sort of stuff.’”

At one point, the head of the team talks about the capabilities of computer facial recognition systems:

“‘It’s bullshit,’ Mick Neville said when I asked him about automated facial recognition. ‘Fantasyland.’ At the airport, when a scanner compares your face with your passport photo, Neville explained, ‘The lighting’s perfect, the angle’s perfect.’ By contrast, the average human can recognize a family member from behind. ‘No computer will ever be able to do that.’”