This is not for patent disputes in general, only disputes involving standard essential patents (SEPs), which these are. The court took standards setting organis

This is not for patent disputes in general, only disputes involving standard essential patents (SEPs), which these are. The court took standards setting organisation powers to decide fair, reasonable, and non‑discriminatory (FRAND) terms for global application. FRAND licences are global by their nature, so we shouldn't be surprised that the Supreme Court asserted this in its decision. This isn't UK over-reach, but an application of international standard approach, afaict.