I have just set up TVHeadEnd on my RPi2 just to see how it all works.
I've managed to get services TV1,2,2+1, 1+1, and a number of others, however what is missing is TV3, TV3+1, FOUR, FOUR+1, presumably the MediaWorks (MUX) channels.
Weirdly, I am seeing Maori TV, which is apparently a mediaworks channel, according to this page.
Has anyone else set up tvheadend before? I've never used FreeView before (Haven't actually watched a proper TV transmission for quite some years at home).