Well thanks Sonos. I can now, after several months, play my music library stored on my Mac but to be fair, the instructions how to do so failed miserably and I had to make it up as I went along. The hand that giveth also taketh away: the price for this restoration of the original service is that now BBC Sounds will not play.
Useless bit of kit in my view. I would sell my speakers but who would buy them?

