UK prescribed medical cannabis is typically consumed through vaporisation...

https://mill-wiki.win/index.php/What%E2%80%99s_the_Point_of_Avoiding_Combustion_with_Medical_Cannabis%3F

UK prescribed medical cannabis is typically consumed through vaporisation rather than smoking to avoid harmful toxins. Vaporiser type—conduction or convection—and temperature settings influence the effectiveness and safety of inhalation