I had finally managed to get it to play a song through Sonos...and then I also managed to group my Sonos speakers so that it played in all rooms. But I absolutely cannot get it to play my playlist on Spotify.
It will just NOT do it. I have tried every variation of instruction. It simply does not recognise the option of playing a playlist on Spotify through Sonos.
And as I only ever play my playlists...it is useless.
So that can go in the bin and back to using my hands.
Best answer by sethg
However, I thought I would give it one more go and start again from scratch. As I was doing that I realised that I had set Spotify on Alexa to my family account and not to my individual account. So I unlinked it and relinked it to my own account (as part of the family account).
And now it works!!