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

https://wiki-byte.win/index.php/Can_a_Plant-Based_Medicine_Be_Prescribed_If_It%E2%80%99s_Smoked%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