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

https://remote-wiki.win/index.php/Medical_Cannabis_and_Driving:_Your_DVLA_Responsibilities_and_the_Law

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.