In the continuing fight for BBC to gather as much information about you as is humanly (or mechanically) possible, BBC radio stations are no longer available on Sonos Radio or TuneIn.
However you can still listen to live BBC radio by signing up to the BBC Sounds services in the Sonos app but you’ll have to have an account and sign in to use.
All the regular stations are there but you’ll need to delete you’re old BBC favourites and re-favorite them via the new Sounds services.