Navigating medical cannabis as an expat in the UK requires a specialist...

https://fun-wiki.win/index.php/How_Do_I_Know_if_a_Pharmacy_Is_Licensed_for_Medical_Cannabis_in_the_UK%3F

Navigating medical cannabis as an expat in the UK requires a specialist prescription, not a card. Private clinics handle this process differently than the NHS, so you must bring full medical records from home. Always check travel rules before you fly