UK EV drivers using medical cannabis should be aware of the ‘in charge’ rules...

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

UK EV drivers using medical cannabis should be aware of the ‘in charge’ rules that apply when parked and charging. Even with a prescription, the legal THC limit of 2 micrograms per litre of blood applies