The UK’s privacy watchdog has opened an investigation into the use of facial recognition cameras in a busy part of central London, it has said.

On Thursday the information commissioner, Elizabeth Denham, announced she would look into the technology being used in Granary Square, close to Kings Cross station. Two days earlier, the mayor of London, Sadiq Khan, had written to the development’s owner demanding to know whether the company believes its use of facial recognition software in its CCTV systems is legal.

The Information Commissioner’s Office (ICO) says it is “deeply concerned about the growing use of facial recognition technology in public spaces” and is seeking detailed information about how it is used.

“Scanning people’s faces as they lawfully go about their daily lives in order to identify them is a potential threat to privacy that should concern us all,” said Denham. “That is especially the case if it is done without people’s knowledge or understanding.

“My office and the judiciary are both…

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