Medical cannabis has been legal since 2018, but it remains strictly controlled....

https://yenkee-wiki.win/index.php/How_Long_Does_It_Really_Take_to_Figure_Out_Eligibility_for_Medical_Cannabis_in_the_UK%3F

Medical cannabis has been legal since 2018, but it remains strictly controlled. You cannot get a prescription from a GP; it requires a specialist consultant, typically after other treatments have failed