There is no government-issued medical cannabis card in the UK. Access requires...

https://fernandoposo361.image-perth.org/what-follow-up-care-do-medical-cannabis-patients-need-in-the-uk

There is no government-issued medical cannabis card in the UK. Access requires a specialist consultation and your medical records. With a prescription, you can purchase an optional card as proof of lawful use, though this is not a legal requirement.