British police forces and retailers are rapidly deploying live facial recognition technology across the UK, with London's Metropolitan Police having scanned more than 1.7 million faces so far this year — an 87% increase on the same period in 2024. The systems work by matching faces captured on camera against watchlists in real time, enabling officers to intercept individuals within seconds of a match, but critics warn the rollout is outpacing the fragmented regulatory framework meant to govern it. Civil liberties groups have raised concerns about wrongful identifications, disproportionate error rates for Black and Asian individuals, potential misuse at protests, and the broader chilling effect of routine mass surveillance in public spaces — while the Home Office says it is considering a new legal framework to address the gaps.