UK medical cannabis is typically vaporised, not smoked, to avoid harmful toxins...
https://iris-wiki.win/index.php/Why_Are_Conduction_Vapes_Cheaper_Than_Convection_Vapes%3F
UK medical cannabis is typically vaporised, not smoked, to avoid harmful toxins from combustion. Vapour quality depends on device type—conduction heats directly, convection heats air—and temperature settings, influencing effects and efficiency