For EV drivers with medical cannabis, the law is nuanced. A medical defence...

https://atomic-wiki.win/index.php/What_does_%27taken_exactly_as_directed%27_mean_for_the_medical_defence%3F

For EV drivers with medical cannabis, the law is nuanced. A medical defence exists, but you must meet DVLA fitness standards. The 2µg/L THC limit applies; legality is not a substitute for responsibility. If your prescription impairs you, don’t drive.