Prescribed cannabis is rising, but road rules are strict. The 2µg/L THC limit...

https://www.stall-bookmarks.win/for-ev-drivers-on-medical-cannabis-legality-isn-t-a-pass-while-a-medical

Prescribed cannabis is rising, but road rules are strict. The 2µg/L THC limit applies regardless of your prescription. A ‘medical defence’ exists, but isn't immunity if impaired. Keep DVLA records current