Medical cannabis prescriptions aren't a road pass. You’re still bound by the...

https://www.pawn-bookmarks.win/prescribed-cannabis-is-legal-but-the-2-g-l-thc-limit-applies-to-all-a-medical

Medical cannabis prescriptions aren't a road pass. You’re still bound by the 2mcg/L THC limit and DVLA fitness standards. A medical defence is no substitute for your duty to drive safely