https://www.techdirt.com/articles/20200127/18190643810/london-police-moves-forward-with-full-time-deployment-facial-recognition-tech-that-cant-accurately-recognize-faces.shtml

The London Metropolitan Police sure loves its facial recognition tech. But it's an unrequited love. The tech doesn't appear to have done anything for the Met during its past deployments.

Documents obtained by Big Brother Watch in 2018 showed the Met's deployments had rung up a 98% false positive rate in May of that year. Nothing improved as time went on. Subsequent documents showed a false positive rate of 100%. Every "match" was wrong. Not exactly the sort of thing you want to hear about tech capable of scanning 300 faces per second.