Police forces will find themselves taken to court over their use of live facial recognition technology, a watchdog has warned. The controversial system, set to be used by all police forces in England and Wales , is not “fool proof” and could land forces in legal difficulty, the Biometrics and Surveillance Camera Commissioner said. Professor William Webster said “misidentified” members of the public could sue the police for breaching their fundamental rights. It comes as live facial recognition is set to be used for the first time in policing a protest. The Metropolitan Police has said it will use it at the Tommy Robinson-led Unite the Kingdom rally on Saturday. Cameras will be set up in a location that is not on the route of the march, but is expected to be used by a lot of people attending the event. There remain more than 50 outstanding and unidentified suspects after violent clashes between police and protesters at the previous Unite the Kingdom event in September.…