A developer of a 67-acre site in London's King's Cross has defended its use of facial recognition technology.Developer Argent insisted that the tool was used to “ensure public safety” and was one of “a number of detection and tracking methods”.The site may be probed as under data protection laws, firms must provide clear evidence that there is a need to record and use people's images.Silkie Carlo, director of Big Brother Watch, called it “the worst-case scenario for privacy”.The recently redeveloped area includes Google's headquarters for the UK, as well as the head office of its AI subsidiary DeepMind. It also encompasses parts of Central St Martins' College, schools and shops.”These cameras use a number of detection and tracking methods, including facial recognition, but also have sophisticated systems in place to protect the privacy of the general public,” said a spokesman.