That is a funny one.
Yesterday late - as I read the thread - I turned on netradio on my V1 and saw that indeed it could not connect to the BBC channels.
Same there this morning.
However, on my Avant MK1 they play just fine (although rather lowres’ed at 128, which is no joy with bigger speaker setups).
And yes, they are on the same (wired) home network!
Anyway - at least when it comes to the V1/Avant MK1 platform - there is no TuneIn working there.
See picture - sorry for the quality, too much light here this morning.
This is probably the same network that B&O is using with the Bang & Olufsen Radio - at least I hope so.
GlynRJ does not state which version of the Avant he is using - so a bit hard to say something to that really.
As always, details, details, details help a lot, when troubleshooting.
But alas, now I have to find out, why the stations are running fine on one tv and not on the other ;-(
MM