I would like to be able to start playback from any point within a playlist

After reading up on links from John B (thanks!) and a Sonos reply to my Facebook post (which they answered within 5mins!) I've started using the queue feature which isn't particularly obvious and just to the right of the volume slider at the very bottom of the screen when a track is playing. This allows you to jump in at various places but again as Gtrance says it's very clunky and doesn't give you very much flexibility. It basically adds so many more unnecessary steps to an already quite long winded process!

Not really sure why Sonos developers haven't really got to grips with making this as user friendly as possible??

Indeed - mine is the most recent post in that topic.
This is what we need !

Tracks play from the Queue. First, tracks should be added to the Queue by some method, usually Add To Queue or similar. On desktop controllers, right click on an artist, album, or track. Finally, once the tracks are added to the Queue, scroll to the desired play point and initiate play. Play will continue, track by track, until the Queue is exhausted.