If you listen to BBC, I would suggest BBC Sounds Sonos Service, rather than TuneIn:

https://www.bbc.co.uk/sounds/help/questions/listening-on-a-smart-speaker/sonos

No problem here using BBC Sounds in the Sonos app for R2.

Thank you. I should have clarified I’m in Ireland.  It’s seems there is a geo block now on the app outside of the UK

And you you’d temporarily set your country to the UK, install BBC Sounds and change your country setting back?