Prescribed medical cannabis doesn’t grant immunity on the road. While a...

https://www.tool-bookmarks.win/medical-cannabis-is-legal-but-driving-is-a-separate-issue-stick-to-the-2-g-l

Prescribed medical cannabis doesn’t grant immunity on the road. While a statutory medical defence exists for the 2µg/L THC limit, you must remain fit to drive. The DVLA requires you to declare any condition that could impair your ability behind the wheel