Medical cannabis is legal, but driving isn't a free-for-all. Keep under the...

https://wiki-triod.win/index.php/What_counts_as_being_impaired_if_I_am_on_prescribed_cannabis%3F

Medical cannabis is legal, but driving isn't a free-for-all. Keep under the 2μg/L THC limit and maintain DVLA fitness. A medical defence exists, but legality doesn't replace personal responsibility: if you’re impaired, stay off the road.