Police scanned 500,000 faces at stations and arrested nobody.
British Transport Police ran live facial recognition at nine London stations between February and July. The £320,786 trial produced one watchlist alert, and that match turned out to be wrong. The force has since extended it by four months and is moving into the Underground.
Why it mattersThe cameras are spreading to more stations on the strength of a result that caught nobody. If you walk through a London station, your face is measured whether or not anyone wants you.
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