Hello @Joe21, welcome to Sonos Community!

I am sorry to hear you are having trouble controlling your Sonos Home Theatre with the Sky Glass TV remote controller.

Since you’ve connected your Sonos with a HDMI to your TV, the remote controller should automatically work.

First thing to try would be to initiate a Remote Control Setup via the Sonos App. You can find that under Settings → System → “Name of your Home Theatre Room" → Remote Control Setup.

If that doesn’t work then follow the same process as above but instead of tapping Remote Control Setup, tap TV Setup.

I am sharing below two very helpful Support Articles for some additional information and instructions:

Control Sonos home theater with your TV remote

TV remote not detected by Sonos

If none of the above resolves your issue, I would suggest reaching out to our Support Team for some live troubleshooting.

I hope this helps.

You need to clear the sky glass remote by pushing 7 and 9 together for three seconds and then 4 and 6 together for three seconds to put control into IR mode. Then go through the process on sonos app to add remote and you should be good to go.