UK electric vehicle drivers using medical cannabis should be aware of 'in...

https://nova-wiki.win/index.php/Is_There_Any_Point_Explaining_the_Law_to_Police_at_the_Roadside%3F

UK electric vehicle drivers using medical cannabis should be aware of 'in charge' rules, which mean you can be tested even when parked and charging. The legal THC limit is just 2 micrograms per litre of blood