Legally prescribed cannabis doesn’t exempt you from the 2µg/L THC limit. A...

https://chanceanfi100.image-perth.org/can-i-lose-my-licence-for-not-telling-dvla-about-medication-side-effects

Legally prescribed cannabis doesn’t exempt you from the 2µg/L THC limit. A medical defence exists, but you must still meet DVLA fitness-to-drive standards. Legality isn't a substitute for responsibility: being ‘legal’ isn't being safe