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

https://mighty-wiki.win/index.php/What_Are_Anti-Inflammatory_Drugs_and_Why_Do_Arthritis_Patients_Use_Them%3F

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