UK EV drivers using medical cannabis should be aware that the 'in charge' rules...

https://wiki-book.win/index.php/What_Should_My_Prescriber_Write_to_Help_with_Driving_Questions%3F

UK EV drivers using medical cannabis should be aware that the 'in charge' rules apply even when parked and charging. The legal THC limit of 2 micrograms per litre means a roadside swab can lead to a blood test