Since 2018, medical cannabis has been a legal treatment option in the UK,...

https://highstylife.com/is-there-a-safe-way-to-explore-cannabis-for-arthritis-without-buying-illegally/

Since 2018, medical cannabis has been a legal treatment option in the UK, though it is not a first-line therapy for arthritis. Access requires a specialist consultant assessment, and most patients currently source it via private clinics