Tech Tent

The use of facial recognition in public by a UK police force was unlawful, says the Court of Appeal. Plus how a new global policy network aims to help reign in the power of big technology firms. And China’s Xinhua dictionary gains a raft of tech terms. Presented by Zoe Kleinman, with BBC reporter David Molloy. Produced by Jat Gill.(Image: Stock photo of a British police officer standing in front of a crowd. Credit: Getty Images).