Accessing medical cannabis in the UK requires a specialist, not a card. Private...

https://wiki-aero.win/index.php/The_Safest_Way_to_Handle_International_Travel_with_Medical_Cannabis

Accessing medical cannabis in the UK requires a specialist, not a card. Private clinics lead here, as the NHS rarely prescribes it. You must secure your medical records first. If you travel, check local rules carefully