Thousands of fans attending the Beyoncé concert in Cardiff could be scanned by live face recognition cameras deployed in the area by South Wales Police.

The cameras will help identify people wanted for “priority offences”.

Police also used the cameras at the Coronation, but the technology has been criticised by human rights campaigners.

The Surveillance Camera watchdog Fraser Sampson said more work needs to be done to check for bias in the use of the technology.

He also warned that rules governing the technology could be weakened by a planned new law, and that without them we risk China-like surveillance.