I'd be totally un-shocked if the UK criminalized Starlink (over OSA or otherwise), in part because they've already criminalized it before, in some of their territories[0,1].

[0] https://news.ycombinator.com/item?id=42979869 ("Starlink in the Falkland Islands – A national emergency situation? (openfalklands.com)"—225 comments)

[1] https://news.ycombinator.com/item?id=37645945 ("Saint Helena Island Communications (sainthelenaisland.info)"—145 comments)