The Metropolitan Police are increasingly utilizing Live Facial Recognition (LFR) technology to apprehend wanted individuals, leading to hundreds of arrests and prompting debate over privacy rights. The system employs mobile CCTV cameras and artificial intelligence to scan public spaces, comparing the facial biometrics of passers-by against a watchlist of those sought for crimes, court appearances, or breaches of protective orders.
Sergeant Kevin Brown, a supervisor with the Metropolitan Police team, described LFR as a "brilliantly efficient way to apprehend wanted people." According to police figures, the technology facilitated 574 arrests in its initial year of use in 2024, escalating to 1,135 in the following year, with approximately 900 arrests already recorded this year. The Met Police stated that since the start of 2024, over 2,100 arrests have been made using LFR, with 24% related to violence against women and girls, resulting in over 1,400 charges or cautions.
LFR technology was first trialed in the UK in 2015, with South Wales Police notably using it at the 2017 UEFA Champions League final to identify football hooligans. Since then, over a dozen police forces across the UK have adopted the technology. Home Secretary Shabana Mahmood has supported plans to expand the number of LFR mobile vans nationwide to 50.
Despite law enforcement endorsements, civil liberties advocates express concerns about the erosion of privacy and anonymity. Charlie Whelton, policy and campaigns officer at Liberty, likened passing an LFR camera to showing identification at a checkpoint, an action many would find intrusive for everyday activities. "Privacy is an important and hard-won right," Whelton stated.
During a demonstration, officers set up an LFR van near a shopping center. The system compares faces of individuals captured by cameras against a watchlist of 18,000 people. If a match is detected with a certainty level above 64%, an alert is sent to officers. Those identified are then approached and questioned. In one instance observed, seven individuals were arrested for offenses including robbery, theft, and stalking.
The Met Police maintain that the LFR algorithm has undergone independent testing by experts at the National Physical Laboratory. However, research published by the Home Office has raised questions about the accuracy of retrospective facial recognition systems, particularly concerning high rates of false positives for Black and minority ethnic individuals. One study indicated that the failure rate for Black women was 100 times higher than for white women.
Campaigners warn that the rapid deployment of LFR without specific legislation creates a risk of future misuse, potentially by authoritarian regimes to track citizens. The late Pope Francis, along with Microsoft and IBM executives, had previously cautioned about the dangers of biometric technology being used for political ends.
One notable success cited by the Met involved the use of LFR in Denmark Hill, London, where the system flagged a registered sex offender, David Cheneler, who was found to be in breach of an order preventing him from being unaccompanied with a child. Sergeant Brown highlighted this case, stating, "Had we not intervened, I dread to think what could have happened to that little girl. But that's why we come to work every day, to try to make a difference."
The Met also reported significant results at the Notting Hill Carnival, where LFR led to 61 arrests and checks on 30 registered sex offenders, three of whom were found to be in breach of their orders. A trial using static cameras in Croydon from October 2025 to March 2026 resulted in 173 arrests and a claimed 10.5% reduction in overall crime, including a 21% decrease in violence against women and girls in the area.
Concerns about the lack of clear legislative framework persist. While the government has indicated plans for a new legal framework governing facial recognition use, the process has been slow. Professor William Webster, the UK's independent biometrics and surveillance camera commissioner, noted that in the absence of specific legislation, police forces rely on court rulings. "This technology is always going to butt against human rights and we need legislation to ensure that the technology is used in such a way as to safeguard those rights," Webster stated.
Civil liberties groups like Big Brother Watch argue for robust safeguards to guarantee privacy and prevent future misuse. "Having nothing to hide does not mean you want to be watched," said Jasleen Chaggar, senior legal and policy officer at Big Brother Watch. "Mass surveillance infrastructure, once built, is rarely dismantled, meaning any future government with authoritarian instincts inherits it ready-made."