Prescribed medical cannabis is increasingly common, but it creates a legal...

https://dlf-ne.org/can-i-drive-in-the-uk-if-i-have-a-medical-cannabis-prescription-the-reality-behind-the-wheel/

Prescribed medical cannabis is increasingly common, but it creates a legal minefield for motorists. While a ‘medical defence’ exists for the 2μg/L THC limit, it isn’t a blanket immunity