The 55 inch version of the Hisense U7A is a really good deal for £600, but the only thing is there’s no guarantee it will work as it’s not on the list.
There’s the Samsung NU7100 which in theory should work as it’s the newer model of the MU6100 I had, which works on all modes. That’s only an 8-bit panel though and if you want a set that can handle HDR properly it would probably cost you near £1000.
If you don’t mind buying from Amazon you could still get a Samsung MU6120 which would definitely work with all modes as I have tested it. The 43 inch version is £400 and the 55 inch version is £650. That’s only if you don’t care too much about HDR though.