UK High Court Rules Met Police Facial Recognition Legal. He'll Appeal.

CCTV surveillance camera mounted on a wall monitoring a public area — Photo via Unsplash

TL;DR: On April 21, 2026, the UK High Court dismissed a legal challenge to the Metropolitan Police’s live facial recognition (LFR) system, ruling it lawful and compatible with human rights. Lord Justice Holgate and Mrs Justice Farbey found the Met’s policy contains “clear, interlocking and cumulative constraints.” The claimants (youth worker Shaun Thompson, who was wrongly identified and threatened with arrest by LFR in 2024, and Big Brother Watch director Silkie Carlo) will appeal. The ruling clears the way for the UK government’s plan to expand from 10 to 50 facial recognition vans across England and Wales.

What the Court Actually Said

The case is R (Thompson and Carlo) v Commissioner of Police of the Metropolis [2026] EWHC 915 (Admin). Two judges. Unanimous decision. Challenge dismissed on every ground ^[1].

The claimants didn’t argue that facial recognition is inherently illegal. Their case was narrower: that the Met’s September 2024 policy gives officers too much discretion over when and where to deploy LFR cameras, making it impossible for Londoners to know when they might be scanned ^[2].

The court disagreed. Lord Justice Holgate and Mrs Justice Farbey found the policy contains “clear, interlocking and cumulative constraints” on LFR use ^[1]. They identified three permitted use cases: crime hotspots, protective security operations, and intelligence-based deployments. Each requires senior authorization, proportionality assessments that weigh the chilling effect on lawful protest, strict watchlist criteria, and geographical limits ^[1].

The judges said the policy was “a far cry” from decision-making based on individual whim ^[1].

They also distinguished this case from R (Bridges) v Chief Constable of South Wales Police, the landmark 2020 ruling that found South Wales Police’s FR use was unlawful because it lacked clear criteria for who goes on watchlists and where cameras get deployed. The Met’s 2024 policy, the court said, fixes those specific problems ^[1].

“No One Should Be Treated Like a Criminal Due to a Computer Error”

Shaun Thompson works with young people affected by violence in London. In February 2024, he was walking through an area where the Met had deployed LFR cameras. The system flagged him as matching someone on a police watchlist. Officers stopped him, detained him, and threatened him with arrest ^[3] ^[4].

He wasn’t the person on the watchlist. The system got it wrong.

Thompson was later awarded compensation for the incident. But the experience made him a claimant. He compared the technology to “stop and search on steroids”: a framing that carries particular weight in a city where stop-and-search already disproportionately targets Black men ^[3].

“No one should be treated like a criminal due to a computer error,” Thompson said after the ruling. He confirmed he’ll appeal ^[3].

3 Million Faces, 12 False Alerts, 2,100 Arrests

The Met used the ruling as a victory lap. Commissioner Sir Mark Rowley called it “a significant and important victory for public safety” and rattled off statistics ^[5]:

3+ million faces scanned in 2025
2,100+ arrests since January 2024
24% of those arrests involved violence against women and girls
100+ sex offenders arrested
1,400+ individuals charged or cautioned
Only 12 false alerts from millions of scans
Zero arrests from false alerts

Rowley added that “80 per cent of Londoners support” the technology. “The question is why we would choose not to use it,” he said ^[5].

The “12 false alerts” figure deserves scrutiny. Thompson was one of those 12. He was detained and threatened with arrest. The Met counts that as “no arrest from a false alert”: technically true, but a strange way to describe being stopped by armed police because a computer said you were someone else.

And “12 false alerts” out of 3 million scans sounds impressively accurate, until you consider that the system only generates alerts when it thinks it has a match. The real question isn’t how many false positives the system produces. It’s how many false negatives it misses, and whether scanning 3 million innocent faces to catch 2,100 people meets any reasonable definition of “proportionate.”

Big Brother Watch: “The Fight Is Far From Over”

Silkie Carlo, director of Big Brother Watch and the second claimant, didn’t mince words after the ruling ^[3]:

“This is a disappointing judgment but the fight against live facial recognition mass surveillance is far from over. There has never been a more important time to stand up for the public’s rights against dystopian surveillance tech that turns us into walking ID cards and treats us like a nation of suspects.”

Carlo argued that LFR cameras “should be reserved for the most serious cases rather than used to scan millions of people.” Big Brother Watch is crowdfunding to support the appeal ^[3].

During the original hearing earlier in 2026, lawyers for Thompson and Carlo told the court that facial recognition data is comparable to a DNA profile, and that permanent installations would make it “impossible” for Londoners to move freely without routine biometric capture ^[2].

The court acknowledged the privacy intrusion but found it justified by the safeguards in the Met’s policy. Whether the Court of Appeal agrees is another question.

50 Vans Coming to a Street Near You

The timing of this ruling matters. In January 2026, the UK Home Office announced plans to increase the number of facial recognition vans from 10 to 50 and make them available to all police forces across England and Wales ^[6].

That expansion was always going to face legal obstacles. This ruling just removed the biggest one.

The Met’s LFR system is no longer a London experiment. It’s a blueprint. The Home Office can now point to the High Court’s stamp of approval when rolling out facial recognition nationwide. Every police force that adopts the Met’s September 2024 policy template (same three use cases, same authorization chain, same proportionality assessments) can argue they’re operating within the law as the court defined it.

The Equality and Human Rights Commission intervened in this case, backing the claimants’ position that LFR was incompatible with human rights law. The court disagreed with the EHRC too.

From Bridges to Thompson: How the Law Shifted

In 2020, the Court of Appeal ruled in Bridges v South Wales Police that facial recognition use was unlawful because the policy was too vague. No clear rules on who goes on watchlists. No limits on where cameras go. Too much discretion for individual officers ^[1].

The Met spent four years writing a policy that addressed those exact criticisms. The September 2024 policy adds defined use cases, senior authorization requirements, mandatory proportionality assessments, and automatic deletion of non-matching biometric data ^[1].

The High Court bought it. The question the appeal will answer: are policy documents enough, or does mass biometric scanning require something stronger, like primary legislation with democratic oversight?

Right now, there is no UK law that specifically authorizes or regulates police facial recognition. The Met operates under a patchwork of data protection law, human rights obligations, and internal policy. Carlo and Thompson are betting the Court of Appeal will say that’s not enough.

What You Can Do

Support the appeal: Big Brother Watch is crowdfunding legal costs for the appeal. The outcome will shape facial recognition policy for all of England and Wales
Know your rights at a deployment: You can walk away from a facial recognition zone. There’s no legal obligation to walk through the camera field. Officers must display signage. You can refuse to be scanned, though the Met has been criticised for making that difficult in practice
Contact your MP: There’s still no dedicated facial recognition law in the UK. The government is expanding the technology under existing data protection frameworks rather than passing specific legislation with parliamentary debate. Find your MP
Track deployments: Big Brother Watch tracks known LFR deployments across London. Follow their work to know when cameras are in your area

References

Published: April 22, 2026