You write:
"quite old (6 years?) big brand internet radios like Roberts Stream 93i still work just fine"
Do they? The BBC changed the way they stream entirely last March, bringing the operation in-house and altering the streams to use newer methods that (supposedly) reduce their server load. Many internet radios that could not get updated firmware simply stopped being able to play any BBC streams because they could not cope with a "chunked" (i.e., interrupted) stream connection. (I have two. Fortunately the company still sort-of supports that model; they originally promised updated formware by July, now they say it will take until end of year. Meanwhile they play BBC streams for about 2 seconds and then stop.) Do you have a Robrrts 93i, and have you tried it when the Brennan plays a "restricted rights" message?
The Roberts93i used the Reciva stream aggregator. Reciva shut down their service in the spring of this year, so the 93i doesn't work at all unless heavily modified by the user. The 93i was replaced a while back in the Roberts line by the 94i, which might still work as it is a supported model, but: *you have to buy a new internet radio* as they won't give it to you free.
Other manufacturers have similar problems; Read the comments at
where the BBC "explain" that it's your problem and if your radio manufacturer can't help you *they don't care*. Lots of users simply lost access to BBC streams entirely last March.
The Brennan devices, like most commercially manufactured internet radios, depend on a stream aggregator for the stream URLs to which they connect. Otherwise they'd have to tell you to find the d*mn URL yourself and type it in, because keeping up with all the internet streams in the world is an impossible task even if you have nothing else to do. (Ask Vinnie at
radiofeeds.co.uk -- and he only keeps track of UK stations!). vTuner provides their services internationally, so they provide primarily streams that are available internationally. Internet servers can figure out where you are from your IP address and ISP, but that information isn't available to vTuner, and even if it were they can't pass it along to the BBC to locate a geo-restricted stream URL for you.
If you'd like to build your own internet radio using a Raspberry Pi and some hobbyist software, go ahead. I have one. It cost me about US$100 in parts and a bunch of time spent reading and figuring out. Nice project for a rainy day. Still runs afoul of BBC geolocation restrictions.
One thing that *might* help on the Brennan devices is if Martin would allow us to enter a stream URL manually, in addition to the current method of getting URLs from an aggregator. There are separate UK-only streams for some of the stations, using Yet Another completely different streaming method, that might have some of the programming currently blocked on the international streams. But for the moment, this is an aggregator issue, and pretty much all internet radios suffer under it.