This photo taken on October 14, 2025 shows Chris Fields, CMO of AI-powered age verification start-up Yoti, giving a demonstration of the company's age verification technology at their offices in London. As governments crack down on online platforms from social networks to porn sites, business is booming for a specialist sector offering AI age checks based on selfies. (Photo by HENRY NICHOLLS / AFP via Getty Images) / TO GO WITH Britain-Technology-internet-biometrics-children,FOCUS by Olivier DEVOS and Mona GUICHARD