Sorry but this has nothing to do with the DNS, I have already tried disabling it and using my ISPs normal DNS servers. Same problem, and as I stated in the OP the low bit rate (non geo locked) BBC streams dont work. Also this hasnt been exclusively a BBC station problem, many stations are coming up with this error.
BTW I have used this DNS service (Getflix) for several years previously without issue with Roon. Its only the past few months where I havent been using radio and just decided to put the stations back in. Roon doesnt need to “support” the DNS service, it just tells the other end my IP is in the UK and should be transparent to Roon. No matter, if Roon used to work fine and J River still does, then something is broken
Other thing to mention I am running Roon Server on my Synology NAS at the moment (everything else works perfectly).