Many expats mistakenly seek a cannabis card. In the UK, you need a specialist...

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

Many expats mistakenly seek a cannabis card. In the UK, you need a specialist prescription, not a permit. Have your medical records ready for private clinic review, as the NHS rarely prescribes. Always research local laws before you travel.