Many expats assume a "medical cannabis card" holds weight in the UK, but it...

https://yucatanmagazine.com/how-expats-in-the-uk-access-medical-cannabis-prescriptions/

Many expats assume a "medical cannabis card" holds weight in the UK, but it does not. You need a valid prescription from a UK-based specialist. The NHS rarely prescribes this, so most patients use private clinics