There are oddities:
If I put a different Hub on for the very first time the radio is fine for several hours. The problem returns after subsequent changes. (I have tried two Smart Hub 2s and a Home Hub 6.) I have switched Smart Setup off - no difference.
Sometimes, but not often, the radio streaming works smoothly
If the streams are OK when I switch the PC off the problem reappears when the PC is switched on again.
The intervals between stream breaks usually alternate regularly between ~30 seconds and ~290 seconds.
BT have sent an Openreach line engineer and a Qube engineer to investigate. They could find nothing wrong at this end or up to the exchange. I am told an engineer will check upstream from the exchange tomorrow.
Any ideas are welcomed.
BT Fibre 2Smart Hub 2 St Ives Cambs (EMSTIVE)