Police deployment of facial recognition is no longer the work of science fiction. Across the world police forces are rolling out the system, but the technology is fraught with issues: from civil liberty to racial bias. Privacy campaigners say that fa... (more)cial recognition in surveillance has advanced beyond any government legislation and is being used without any regulation. Serious questions are being asked: Where does the data come from? Who should be surveilled? Will these systems be abused?