There is no official UK government medical cannabis card. Access requires a...

https://brooksiwjk610.wpsuo.com/what-is-a-cannabis-based-medicinal-product-cbmp-in-uk-prescriptions

There is no official UK government medical cannabis card. Access requires a specialist consultation and valid prescription, supported by your medical records. Private clinic cards are optional, acting as a way to prove you have a lawful prescription.