France, yes. Spain I have no firsthand knowledge of but i can see no reason why if you can get HD you wouldn’t be able to get sky.
“someone I know” just got the biggest sky dish he could find off ebay the one they give to people on the Shetland islands i think lol, plus a sky brand Q LNB, and handed them to the guy fitting it, since this is literally what he said to do on his website… something about the arms of normal round dishes being a pain to fit the Q LNB to, and it has all worked fine, but if you have a dish for HD then you could prob just switch the LNB. The Q box uses two outputs of the LNB i think, and the others are all used for freesat boxes in around the house. That said, you’re more technical than “someone I know”, @Danny, so you may have sussed all this already, but if you can get HD, then i think Q should be fine.