Hello skymanuk.
Wes it’s quite simple your tv is the same as my samsung.
the 2060 is the 4k (better known as ultra H.D).
However. Freeview’s main transition’s go upto and includes H.D .
Which is the 1080. default settings, as do all pvr’s on the market.
Hence, if yo have a look on your tv tuner, freeview guide list,
you’ll find extra channels ( 4000,4001, 4002 4003 &4004)
these are previews for setting up ultra H.D on freeview in the future.
These will not appear on your Humax as it doesn’t have an ultra H.D tuner on it.
I hope this helps.