I got Fallout 4's DLC - primarily so I can play Fallout London. I also picked up X4: Foundations, and Fallout 76 as well. All were pretty heavily discounted.
I think it's even more sinister than that. The implication in the article is that they didn't want them in the UK because they could be forced to give evidence in court about possible UK special forces war crimes.
I'm not sure tbh, when I do mod it, I'll post here.