UK's Information Commissioner's Office challenges the interpretation of a court ruling that gave the green light for using facial recognition on the public.

Axar.az reports citing foreign media that Denham said live facial recognition was a significant change in policing techniques that raises "serious concerns".

"Never before have we seen technologies with the potential for such widespread invasiveness. The results of that investigation raise serious concerns about the use of a technology that relies on huge amounts of sensitive personal information," she said.

The privacy watchdog will be pushing the idea of a code of practice with the UK's chief surveillance bodies, including policing bodies, the Home Office and the Investigatory Powers Commissioner.