Medical cannabis users have a defence for the 2mcg/L THC limit, yet you must...

https://medium.com/@ada_chambers55/i-got-a-new-ev-and-started-medical-cannabis-the-no-nonsense-guide-to-keeping-your-licence-8268cb32a653

Medical cannabis users have a defence for the 2mcg/L THC limit, yet you must still meet DVLA fitness-to-drive rules. Legality isn't a substitute for responsibility; being prescribed doesn't exempt you from impairment laws