Legal since 2018, medical cannabis isn't a first-line treatment for arthritis....
https://chancehbrs925.timeforchangecounselling.com/can-inflammatory-arthritis-patients-apply-for-medical-cannabis-in-the-uk
Legal since 2018, medical cannabis isn't a first-line treatment for arthritis. Access is usually through private clinics following a specialist assessment. If you’re exploring options, do chat with a qualified professional about your needs.