UK EV drivers using prescribed medical cannabis should be aware of 'in charge'...

https://evpowered.co.uk/feature/electric-vehicles-and-medical-cannabis-what-uk-drivers-need-to-know-about-the-law/

UK EV drivers using prescribed medical cannabis should be aware of 'in charge' rules that apply while parked and charging. The legal THC limit is very low, just 2 micrograms per litre of blood