PS I hadn't tried bluetoothing my phone to the Brennan before. Just spent some time resetting the dongle, the Brennan now plays Greatest Hits Radio from the phone app via bluetooth. Thanks for the advice. Interestingly, if I cast from the GHR app to the TV soundbar or Google Home that immediately plays the warning that the service is about to stop in a few days. The phone does not pick up the Brennan as a device to cast to, I had to set Media audio in the Samsung phone bluetooth settings.
Still absolutely love my Brennan and support like this is wonderful, thanks again.
Andy