Medical cannabis has been legal in the UK since 2018 for specific conditions....

https://smoothdecorator.com/can-i-get-a-prescription-if-my-arthritis-pain-is-severe-but-my-records-are-thin/

Medical cannabis has been legal in the UK since 2018 for specific conditions. It is strictly not a first-line treatment, meaning specialists must confirm that standard NHS therapies haven’t provided sufficient relief