Driving on medical cannabis? Being legal doesn’t mean you’re exempt from the...

https://wiki-triod.win/index.php/Is_the_UK_Basically_Zero_Tolerance_for_THC_When_Driving%3F

Driving on medical cannabis? Being legal doesn’t mean you’re exempt from the 2mcg/L THC limit. While a medical defence exists, you must notify the DVLA regarding your fitness to drive