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

https://www.emergbook.win/medical-cannabis-has-been-legal-in-the-uk-since-2018-but-it-isn-t-a-first-line

Medical cannabis has been legal in the UK since 2018 for specific conditions. It is strictly not a first-line treatment, meaning specialists must confirm that standard NHS therapies haven’t provided sufficient relief