EV drivers using medical cannabis: legality isn't immunity. A 2µg/L THC limit...

https://evpowered.co.uk/feature/medical-cannabis-and-uk-driving-laws-what-ev-owners-must-know/

EV drivers using medical cannabis: legality isn't immunity. A 2µg/L THC limit applies, and the DVLA requires fitness to drive. A medical defence exists, but impairment remains a risk. Being legal does not replace your duty of care behind the wheel.