[News Engineer]

First are any in the UK being in UHD (up resized from 1080p HDR or otherwise?)

No, both BBC and ITV are 1080i SDR. 

BBC will only do UHD streams if there are UHD HDR (with WCG) host pictures, they made a decision that is what they’ll class as UHD.

ITV don’t do UHD at all, they don’t don’t even do 5.1. (BBC have 5.1 on their broadcast coverage, but 2.0 on streaming - which is the same regardless of the resolution.)