There is no government medical cannabis card in the UK. You must consult a...

https://www.strobe-bookmarks.win/there-s-no-official-uk-government-medical-cannabis-card-access-is

There is no government medical cannabis card in the UK. You must consult a specialist who reviews your medical records for a prescription. If prescribed, your use is lawful. Many carry an optional ID card as simple proof of their legal prescription.