interesting I suspect the UK uses the same Regan Era definition of monopolistic practice as the US, meaning monopoly is fine so long as prices seen by consumers are low (or rather not provably raised)

The UK adopted the EU antitrust model in the 1990s and still kept it after Brexit. So it's has a lot more stuff about 'fairness' and controlling markets, it's not just about prices or monopolies abusing their market position or blocking mega mergers. At least on paper...

You mean Circuit Court judge Robert Bork's "consumer welfare" standard?

He's the genius behind that.

The same Robert Bork whose SCOTUS nomination got held up by the Senate in a deluge of fire and fury, only for Antonin Scalia to get the job and make the same kind of rulings much more articulately.