Prescribed cannabis doesn’t grant road immunity. You’re still bound by the...

https://alpha-wiki.win/index.php/Lane_Keeping_and_Adaptive_Cruise:_Why_Your_Car_Isn%27t_Driving_You_Home

Prescribed cannabis doesn’t grant road immunity. You’re still bound by the 2mcg/L THC limit; a medical defence won't override DVLA fitness-to-drive rules. Remember: legality isn't responsibility. If you’re impaired, you’re liable