Medical cannabis in the UK confuses many expats. You need a specialist...

https://romeo-wiki.win/index.php/Why_Do_Expats_Get_Stuck_Getting_Their_Records_for_UK_Clinics%3F

Medical cannabis in the UK confuses many expats. You need a specialist prescription, not a card. Gather your medical records for private clinics, as the NHS rarely prescribes this. Always check local laws before you travel with your medication