Medical cannabis has been legal in the UK since 2018 but isn't a first-line...

https://doctiplus.net/arthritis-and-medical-cannabis-can-uk-patients-get-a-prescription/

Medical cannabis has been legal in the UK since 2018 but isn't a first-line treatment. Access requires a specialist assessment, often via private clinics, as NHS access is limited. If you’re considering this, please chat with a GP or specialist.