I don't understand
How does "user data" help them stream Radio 4?
They managed to broadcast it via am/fm radio for many years without any user data whatsover.
Anyone remember Mike Corley (aka MI5guy) who spammed usenet about 20 years ago claiming that the BBC were spying on him via his television set. We all thought he was completely bonkers. This is now actually happening for real. The BBC are spying on us via our television sets.