[interestednovice]

Is the current BT branded Home Essentials package for those on benefits also moving to EE or is it staying under the BT brand like those for customers who are only landline customers?

I think it is staying with BT. Slightly differently, I am in an area where the Openreach network only provides ADSL services - and if I try to put my details in to order EE broadband, it redirects me to BT since EE only offer “fibre” (FTTC or FTTP) packages. Reading into this (possibly incorrectly) I think other non-standard packages are the same.

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There's no reason Apple TV/non YouView boxes wouldn't not support multicast, as long as the software is written in a way to support it.

True, in theory.

I don’t think the tvOS system player does support it though, and software extensions are limited by Apple on tvOS.