A six-month trial of live facial recognition technology across London railway stations cost £320,786 in equipment hire and police staffing, scanned over half a million faces, and yielded a single false positive match with zero arrests, according to freedom of information documents obtained by Liberty Investigates.
Trial Costs and Surveillance Scope
The British Transport Police ran 18 separate deployments of live facial recognition technology between February and July across some of the capital’s busiest transport hubs. The surveillance equipment scanned more than 500,000 faces in an effort to catch offenders and individuals breaching court orders. Despite the financial investment of £320,786 and nearly 100 hours of police officer time, the initiative produced only one watchlist alert, which ultimately proved to be an incorrect identification.
A British Transport Police spokesperson defended the pilot, stating it was launched to understand how the technology could effectively support the identification of wanted offenders and individuals who may pose a risk to passengers and staff. The force noted that officers made several associated arrests during deployments—including for assault, theft, and possession of an offensive weapon—though these did not result directly from live facial recognition alerts and were thus excluded from the system’s performance data.
Expansion Plans and Official Positions
Despite the initial results, the British Transport Police announced an extension of the trial for an additional four months, with deployments expanding into London Underground stations. Transport for London supported the continuation, stating that the technology targets individuals on police watchlists at key stations to specifically tackle violence against women and girls.
Beyond the transport network, live facial recognition is scaling up across England and Wales. An analysis by Liberty Investigates shows that more than half of police forces in the two nations have deployed the technology on public streets. In London, the Metropolitan Police and the mayor’s office announced plans to install fixed cameras in the West End, with Mayor Sadiq Khan confirming use on the pedestrianized Oxford Street.
Privacy Concerns and Regulatory Scrutiny
Civil liberties groups and parliamentary bodies have raised alarms over the rapid rollout. Parliament’s joint committee on human rights recently identified live facial recognition as a “particularly clear example of risk” to human rights, urging the government to introduce protective legislation.
“Live facial recognition technologies are a serious invasion of our privacy,” said Bell Ribeiro-Addy, the Labour MP for Clapham and Brixton Hill. She called for the government to suspend the rollout until a proper legal framework and stronger safeguards are in place.
Fraser Sampson, a former UK biometrics and surveillance camera commissioner who now serves as a non-executive director at facial recognition firm Facewatch, emphasized the distinction between retail security and public transit surveillance. Sampson noted that while the technology functions effectively to deter shoplifters in controlled store environments, policing an open transport network depends heavily on the accuracy of police watchlists and demands strict proportionality when processing special category personal data.