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UK police and companies must stop using live facial recognition for public surveillance, politicians and campaigners have said.
The technology allows faces captured on CCTV to be checked in real time against watch lists, often compiled by police.
Privacy campaigners say it is inaccurate, intrusive and infringes on an individual's right to privacy.
But its makers say it helps protect the public as it can catch people like terror suspects in a way police cannot.
The Home Office said it supported the police "as they trial new technologies to protect the public, including facial recognition, which helps them identify and locate suspects and criminals".
Catrin Nye reports.