Medical cannabis has been legal since 2018 but isn’t a first-line treatment;...

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

Medical cannabis has been legal since 2018 but isn’t a first-line treatment; standard therapies must be tried first. Access usually requires a specialist assessment via a private clinic. Speak with your GP about your pain management options.