Medical cannabis users have a defence for the 2mcg/L THC limit, yet you must...

https://wiki-quicky.win/index.php/What_does_%27fitness_to_drive%27_mean_for_DVLA_decisions%3F_A_claims_handler%E2%80%99s_perspective

Medical cannabis users have a defence for the 2mcg/L THC limit, yet you must still meet DVLA fitness-to-drive rules. Legality isn't a substitute for responsibility; being prescribed doesn't exempt you from impairment laws