Medical cannabis has been legal in the UK since 2018 for specific conditions....

https://www.bookmarkingqueen.win/medicinal-cannabis-has-been-legal-since-2018-but-it-s-not-a-first-line

Medical cannabis has been legal in the UK since 2018 for specific conditions. It isn't a first-line treatment; consultants typically only consider it after standard therapies haven’t helped