I don’t know if this has been running for a while, but I received an email from BT today stating Game Pass Ultimate is now available through BT for £10 a month (a saving of £0.99 per month; £11.88 per year), with you subscription also manageable via the My BT app.
Xbox Game Pass Ultimate Add-On is an Add-On for existing BT Consumer Broadband customers and provides you with access to the Xbox Game Pass (for use on Xbox games consoles and Windows 10 PC), Xbox Live Gold (for use on games console only) and Cloud Gaming beta (for use on a compatible mobile device).
The Xbox Add-On is made available on a 30-day rolling contract. We’ll apply the charge to your Account each month until you ask us to remove it.
Once you have activated the service the Xbox Add-On will be added to your account. If you already have an Xbox Game Pass Ultimate direct from Microsoft, it will automatically be updated to the Xbox Add-On on your next renewal date and added to your BT account.
We’ve also introduced Offers to MyBT to help you discover personalised deals.