00:00A trial of live facial recognition at London stations cost more than £320,000, with one
00:07false match and no arrests. More than half a million faces were scanned during 18 deployments
00:13between February and July. British Transport Police says the technology is intended to
00:19identify wanted offenders and people who pose risks to passengers and staff. The force has
00:25extended the trial to underground stations and says there have since been three confirmed
00:30alerts involving people who were complying with court conditions. Critics have questioned
00:36whether the technology is proportionate, while police say they are refining deployments, procedures
00:42and watchlists.
