Navigating UK medical cannabis as an expat requires a specialist, not a card....

https://victor-wiki.win/index.php/Can_a_GP_Prescribe_Medical_Cannabis_in_the_UK%3F_Navigating_the_Reality_of_Access

Navigating UK medical cannabis as an expat requires a specialist, not a card. Since the NHS rarely prescribes, you must provide your full medical records to a private clinic for review. Please stay cautious regarding international travel