Posted: Sun Aug 18, 2019 2:04pm
There is very limited UHD content available, so not all your TV will be in UHD. (Netflix only approx 600 titles are in UHD, out of their whole library!)
If you are watching UK channels like BBC ITV C4 Five, via "internet tv / streaming", then these will not be in UHD. Barely HD, and 720hd at best. And 8m download should be more than fine for this. So like i said before, perhaps it is a combination of your tv supplier and internet supplier.
Remember, just because you have a 4k / UHD TV does not mean you are getting or watching the content in 4k / UHD!
Content on Amazon and Netflix and Youtube is automatically adjusted in resolution to cater for your connection speeds.
So if you want your UHD content, you need fast fiber (if available in your area) and not a "wifi" solution, that can fail during the peak periods, especially in summer with all the other tourists in the area using the connections, as you have found out.