Mr reply should read BBC One HD on both occasions
Thanks for your message. I did a call with Sonos for 40 minutes and they did a few diagnostics. Their conclusion was that the Virgin 360 box was interfering with the Sonos Beam. Nothing has changed in my set up, so my confusion is that the Virgin box has a tech fault or maybe a software update has caused an issue. The Sonos team confirmed I was set up OK, in fact we did the set up over again, and changed channels in their settings but as I say, their conclusion after 3 diagnostics was that the Virgin box was the issue (Note: Some channels on Virgin are coming in surround sound, some are not and there is just a low hiss from the surrounds eg: BBC One HD. If I watch TV through the aerial, those same channels (inc BBC One HD) will play through the surrounds)