Ah, thought tivo did it like my other Satellite UltraPlus.
But then why do some channels/programs advertise as HD and others do not?
All satellite Freeview is in SD.
Channels 1,2&3 on freeview UHF/land based terrestrial are broadcast in HD.
Most of the content shown on these channels is SD though, and they upscale it before broadcasting out.
Some content is provided to them in real HD, and they don’t have to upscale this.