Although really a TVHeadend tweak, this may help people who have just brought the TV HAT.
You may have noticed that the channel listings (EPG Info) for the UK HD channels and I think Film 4 are missing. The fix is quite simple, by default TVHeadend does not enable the UK Freeview EPG Grabber, enabling this will fill in the blanks in the EPG.
First set the User Interface level to “Expert”
Configuration -> General -> Base -> 4th option down
Enable the “Over The Air UK Freeview” Grabber
Configuration -> Channel / EPG -> EPG Grabber Modules
Scroll to the bottom of the list to find “Over-The-Air: UK: Freeview”, click on it and click the enabled check box on the right hand panel.
Click on Re-run internal EPG Grabbers and the blanks should be gone…