Hi, the problem you have is, I believe, fundamentally not the Sky Glass, it's the sofa. I have the same problem and am currently working on a fix. The issue is that the Bluetooth module in the sofa (ours is the DFS Cinesound Ventura - I think) is old Bluetooth technology, specifically pre-Bluetooth 2.1. It's considered 'legacy' technology, but it's cheap! It requires a PIN number (xxxx) to be entered to make a successful Bluetooth connection and your Sky Glass - in fact ANY TV with Bluetooth out - cannot provide the PIN number that the sofa requires. Your TV will see the sofa via BT, but when you choose to connect, it will eventually time-out and say something like "unsuccessful". Modern Bluetooth, 2.1 and the later 4.2, use SSP (Secure Simple Pairing) which would not require a PIN, but DFS and others don't use this because - you've guessed it - their profit margin would be less if they did.
My workaround includes using a powered optical splitter, a DAC (Digital-to-Analog Converter) and an old Android phone that makes the Bluetooth connection to the sofa. I'm waiting for the Android phone (Samsung J3) to arrive tomorrow and once I've installed and tested it, I'll let you know if it works and if it does, will make a post to describe the connection in detail to others who have the same problem.
My only regret is not asking the right questions about the sofa in-store as the staff just brushed over the technicalities of the connection at the time. Lesson learnt.
Hope this helps.
