If you’re a medical cannabis patient, being 'legal' isn't a free pass. Even...

https://sierra-wiki.win/index.php/What_is_the_Safest_Way_to_Test_a_New_Dose%3F_A_Guide_to_Navigating_UK_Roadside_Laws

If you’re a medical cannabis patient, being 'legal' isn't a free pass. Even with a medical defence, you must meet DVLA standards and stay under the 2mcg/L THC limit. Legality doesn't replace personal responsibility; if you’re impaired, don't drive.