For EV drivers using prescribed medical cannabis, the 2mcg/L blood limit still...

https://blogfreely.net/neasalnfbo/h1-b-the-medication-minefield-how-to-safely-test-new-doses-without-risking

For EV drivers using prescribed medical cannabis, the 2mcg/L blood limit still applies. While a statutory medical defence exists, you must notify the DVLA and remain fit to drive