This is one for Sonos: ever since BBC launched Sounds, we’ve not been able to start BBC Radio 4 on our Sonos speakers, either as the preferred speaker or just by asking “Alexa, play BBC Radio 4 on kitchen”. Instead Sonos plays a different station, most recently BBC Cymru
About four days ago it suddenly started working seamlessly. I was so pleased. However, this morning they're back to their old tricks (Alex and ‘kitchen’), and it doesn't work.
I read somewhere you were having problems agreeing a licence or something like that with the BBC; it might have been something to do with their introduction of the Sounds app. We're you testing a fix? Can you get it working again?