There’s no official government medical cannabis card in the UK. You must first...

https://yenkee-wiki.win/index.php/What_should_I_do_if_I_get_approved_but_the_pharmacy_delivery_is_delayed%3F

There’s no official government medical cannabis card in the UK. You must first secure a legal prescription via a specialist after reviewing your medical records. While optional ID cards can help verify your status, they aren't a formal medical requirement