There is no official UK government cannabis card. Access is strictly...

https://www.herald-dispatch.com/sponsored/how-to-get-a-medical-cannabis-card-in-the-uk-step-by-step/article_a7f9fcb2-55db-40ff-857f-db6b98c92a97.html

There is no official UK government cannabis card. Access is strictly prescription-first; you will need a specialist consultation and your medical records. While private clinics may offer a patient card, it remains an optional way to prove your lawful use.