Global Player radio stations unavailable in Apple Music

I'm based inthe UK and noticed in the last hour or so (27 Nov 25 12pm GMT) that I cannot play any radio stations (e.g. Classic FM, Capital) that are part of the Global Player network, either within Apple Music on my phone or via my HomePods. It was working first thing this morning but when I try now I just get the "resource" unavailable" error. I can play other radio stations that come under the "Local Broadcasters" section that are served by TuneIn (such as Virgin Radio UK or Smooth Chill).

I can play these Global Player radio stations directly on their web app and on the app on my phone but not via Apple Music.

Strange that it should have been working 4 hours ago but not now. I have not had any internet connection outages, changed or logged in or out of any accounts, or updated any apps, unless it's happened automatically in the background and I wasn't aware

Any ideas what could be causing the issue?