There’s no official government medical cannabis card in the UK. Access depends...

https://ace-wiki.win/index.php/Can_Mental_Health_Conditions_Be_Considered_for_Medical_Cannabis_in_the_UK%3F

There’s no official government medical cannabis card in the UK. Access depends on a specialist consultation and your clinical records. If you receive a prescription, private patient cards are available as optional, handy proof of your legal status.