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

https://blast-wiki.win/index.php/Is_It_Illegal_to_Smoke_Prescribed_Medical_Cannabis_in_the_UK%3F

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