Is Apple iOS 14.5 hurting advertisers?

Apple’s long-awaited iPhone software update arrives with new features to block trackers. What effect is it having so far? Plus, how a machine learning startup aims to help doctors detect lung cancer earlier. And former British Prime Minister Gordon Brown warns of a global digital divide. Presented by Rory Cellan-Jones, with BBC senior tech reporter Zoe Kleinman. Produced by Jat Gill.