Medical cannabis has been legal in the UK since 2018, but it’s not 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 it’s not a first-line arthritis treatment. You’ll need to have tried standard options first. Most access is via private clinics after a specialist review. Do speak with a professional.