Having a medical cannabis prescription isn’t a free pass on the road. While a...

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

Having a medical cannabis prescription isn’t a free pass on the road. While a ‘medical defence’ exists if you exceed the 2mcg/L THC limit, you must still meet DVLA fitness-to-drive standards