I just checked N.RADIO on Beoport and the BBC stations will no longer play (they were working a few weeks ago), so it looks like this could be a result of the end of their ‘Shoutcast’ service which was due to be switched of mid-2023.
EDIT: You have probably seen that I added a post about this on an older thread for completeness, but as you have also mentioned NetRadio it is worth keeping this new thread too!