Prime is under Skys wing. So you can guess the outcome there.

But mTV is under test.

Let me introduce you to an extensive thread about freeview for kod...

https://www.geekzone.co.nz/forums.asp?forumid=151&topicid=198716

I am running TVHeadend with a DVD-S tuner in my home server and can watch Prime and Maori TV on my Kodi clients. Works very well, have all the freeview channels. 

Thanks @SumnerBoy for the link.
 @Oblivian, thanks for sharing how it can be done. I'm running Kodi on my FireTV without a server, and don't have any plans to get one.