Legal medical cannabis isn’t a free pass. While a medical defence covers the...

https://mega-wiki.win/index.php/What_does_GOV.UK_actually_say_about_driving_on_prescribed_medicines%3F

Legal medical cannabis isn’t a free pass. While a medical defence covers the 2mcg/L THC limit, you must still be unimpaired and notify the DVLA of your condition. Legality doesn’t replace your responsibility to drive safely. Always put safety first.