https://newatlas.com/facial-recognition-legality-law-enforcement/55051/

Facial recognition technology is not coming … it's already here. 2018 is fast becoming the year that facial recognition technology finally hits the mainstream with a constant torrent of stories revealing the growing use of these systems by law enforcement agencies around the world. A resident of Cardiff in the UK is now questioning whether the technology violates privacy rights by suggesting that if the country's police forces do not cease using these systems he, and others, will commence high court legal actions.