Medical cannabis is legal, yet roadside limits stay at 2mcg/L. While a medical...

https://future-wiki.win/index.php/Does_having_THC_in_your_system_always_mean_you_are_impaired%3F

Medical cannabis is legal, yet roadside limits stay at 2mcg/L. While a medical defence exists, you must meet DVLA fitness-to-drive rules. A prescription isn’t a free pass; being ‘legal’ doesn’t waive your duty to drive unimpaired