Hi 

I have came up with a workaround  for the issue with international radio station streams not playing in the UK. Here is the solution not ideal but it works. If you have a ROAM or ERA 300 speaker connected to your system you can use your phone to open up the Web app for my tuner radio find the station you want then connect your phone via Bluetooth to one of the above speakers and group with any other sonos speaker in your system. As I said not great but I have my radio stations  back on sonos.