Prescribed medical cannabis doesn’t grant immunity. You still face the 2mcg/L...

https://www.romeo-bookmarks.win/legal-doesn-t-mean-safe-for-ev-drivers-on-medical-cannabis-the-2mcg-l-thc

Prescribed medical cannabis doesn’t grant immunity. You still face the 2mcg/L THC limit, and while a medical defence exists, DVLA fitness to drive rules take priority. Legality isn't a blanket pass; impairment remains your responsibility