I know theres alot of chat about direct access via the bbc sounds app.
I have a samsung tv connected to my sonos system using the optic cable.
I play the app on my samsung pad and then mirror the pad on the tv which then plays BBC sounds through the sonos system. It works
Pretty poor that for such an expensive sound system that we have to go around the houses to just get a sound out of it, when it is so easy to do on a cheap alternitive system that can be had for half the price.
If BBC doesn't want to join with sonos then there must be a big reason for this that sonos aren't letting on about ie money/security/