A six-month British Transport Police trial of live facial recognition scanned more than half a million faces across London railway hubs during 18 deployments between February and July, costing about £320,786 and using almost 100 officer-hours. The trial generated a single alert against a police watchlist, which proved to be a false positive; BTP later extended the pilot by four months and into Underground stations, saying subsequent deployments produced three confirmed alerts of people complying with sexual harm prevention orders or other conditions. BTP maintains officers made a number of related arrests for offences such as assault and theft during deployments, but says those arrests did not result directly from LFR alerts and therefore are not counted in LFR performance metrics. The force also says watchlist growth was deliberately controlled while governance, data quality and safeguarding arrangements were refined.
Civil liberties groups, MPs and privacy experts argue the rollout raises serious rights and proportionality concerns, noting the low yield and at least one incorrect identification amid expanding use across UK forces and planned fixed cameras in central London. Critics point to the processing of special-category personal data, the need for stronger legal safeguards and independent oversight, and warning that system performance depends heavily on watchlist composition, deployment choices and context - factors that make shop-floor deterrents very different from city-wide policing.
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