UK EV drivers using medical cannabis should know that the ‘in charge’ rules...

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

UK EV drivers using medical cannabis should know that the ‘in charge’ rules apply while parked and charging. Even with a prescription, drivers must stay below the 2 micrograms per litre THC limit to avoid issues