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

https://wiki-tonic.win/index.php/Who_Regulates_Prescribing_Standards_for_Medical_Cannabis_in_the_UK%3F

There’s no official government medical cannabis card in the UK. Access starts with a specialist consultation; you’ll need to share your medical records first. If prescribed, you can opt for a clinic-issued card as simple proof of your lawful prescription.