Brief

London police trial of live facial‑recognition cameras ends with one false match

The British Transport Police’s live‑face‑recognition trial in London’s busiest transport hubs finished after scanning half a million faces, but only one alert was issued and it proved to be a false match.

By Felo News Desk · Published Tue, 29 Sep 2026 12:36:05 GMT

The British Transport Police (BTP) concluded a six‑month trial of live facial‑recognition (LFR) cameras in London’s railway stations on 29 September. The trial, which scanned more than 500,000 faces between February and July, produced a single alert against a watch‑list suspect that turned out to be a false positive and resulted in no arrests.

According to a freedom‑of‑information document obtained by Liberty Investigates and shared with the Guardian, the 18 deployments across the trial cost £320,786 and required almost 100 hours of police officers’ time. The equipment hire and staffing costs were borne by the taxpayer.

Last month BTP announced it would extend the trial for another four months and expand the deployments to include London Underground stations. Transport for London (TfL) said the extension would target and identify people on police watchlists at key stations, with a particular focus on tackling violence against women and girls.

Fraser Sampson, former biometrics and surveillance camera commissioner for the UK, said the police must demonstrate that the use of the technology is proportionate. He noted that the success of LFR in shops differs from its use on a public transport network, where the goal is to catch people on watchlists rather than deter shoplifting.

Liberty Investigates reports that more than half of police forces in England and Wales have now deployed LFR on British streets. The Metropolitan Police and the London mayor’s office announced this summer that fixed LFR cameras would be installed in the capital’s West End, and Mayor Sadiq Khan confirmed the technology would be used on the newly pedestrianised Oxford Street.

Key facts

The trial scanned more than 500,000 faces between February and July (theguardian.com)
The trial cost £320,786 and required almost 100 hours of police officers’ time (theguardian.com)
Only one alert was issued, which was a false positive and led to no arrests (theguardian.com)
BTP will extend the trial for four months and add London Underground stations (theguardian.com)
TfL said the extension would target people on police watchlists and tackle violence against women and girls (theguardian.com)
Fraser Sampson said the technology must be proportionate and that success in shops differs from public transport use (theguardian.com)

Background

The trial is part of a broader rollout of live facial‑recognition technology across UK transport hubs, following earlier deployments by the Metropolitan Police and the London mayor’s office in the West End and Oxford Street.

Why it matters

The trial’s outcome raises questions about the effectiveness and proportionality of live facial‑recognition technology in public transport settings, with implications for privacy, policing strategy and public trust.

What happens next

BTP will extend the trial for an additional four months and include London Underground stations, while TfL will continue to monitor the technology’s impact on safety and civil liberties.