Navigating UK medical cannabis as an expat requires a specialist prescription,...

https://astro-wiki.win/index.php/Can_I_Bring_My_Prescribed_Cannabis_into_the_UK_When_I_Fly_In%3F

Navigating UK medical cannabis as an expat requires a specialist prescription, not a card. Private clinics lead the way, but you need your full medical records first. The NHS rarely covers this. Check travel rules carefully before you go anywhere.