In theory yes but then the sales are attributed to the UK company so it would affect their tax avoidance strategy

And report profits in the UK then I presume.

They may have to anyway. There is UK legislation restricting foreign companies trading directly in the UK which I guess wouldn't have applied to the EU pre brexit but would now.

I laughed at your "just" :)

Haha, for some reason, my Appalachian heritage likes to throw in just, just about anywhere.

Do Appalachians say "just" a lot? I don't get it.

At least the region where I'm from, it's kind of a filler word like uhm