UK medical cannabis is typically vaporised, not smoked, to avoid harmful...

https://avasinsightfulinsights.swiftnestly.com/posts/what-does-unlicensed-specials-mean-for-medical-cannabis-prescriptions

UK medical cannabis is typically vaporised, not smoked, to avoid harmful toxins. Vaporiser temperature and device type—conduction vs convection—impact how effectively cannabinoids are delivered