I can find an option to opt in and setup the service but not one to opt out. I opted out in the past but it seems to have turned on again.
So far this fails with SH2 ? Err yes, new contract/account pushes you onto EE (but no info at all on disabling BT/EE Wifi). I did follow the suggestion (url link) in community forum recommendations, but can still see the (hidden) WiFi is present. And yet I'd happily put back the Netgear router, but you need SH2 for the landline phone. Alas no choice when renewing your contract.