Well, initially you only said satellite. Including the Netflix stuff may cause some difficulty. You could try connecting a toslink from the TV, but you have to make sure that it can be setup to ouput a stereo digital signal (Netflix will have stuff like multi-channel Dolby Digital Plus).
The Lifatec toslink is an optical digital cable.
For Yamaha, you should look for Audioquest XLR cables. You may need to look around for a UK Audioquest distributor, maybe something like this:
https://www.audiodestination.co.uk/cables/interconnects/audioquest-red-river-interconnects-pair
There can be others. Or you can try ordering from a USA distributor, like Audio Advisor.