Legal since 2018, medical cannabis requires a specialist assessment and proof...

https://oscar-wiki.win/index.php/Why_Do_UK_Rules_Limit_Medical_Cannabis_Access_Even_Though_It_Is_Legal%3F

Legal since 2018, medical cannabis requires a specialist assessment and proof of past treatments. Because NHS access is limited, most patients use private clinics. It is a strictly regulated process focused on clinical safety and patient care.