Prescribed medical cannabis? Being legal doesn't bypass the 2mcg/L THC limit or...

https://www.save-bookmarks.win/driving-on-medical-cannabis-while-a-medical-defence-covers-the-2-micrograms

Prescribed medical cannabis? Being legal doesn't bypass the 2mcg/L THC limit or DVLA fitness rules. A medical defence exists, but it’s no substitute for alertness