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

https://speedy-wiki.win/index.php/Can_a_GP_Prescribe_Medical_Cannabis_in_the_UK_or_Does_It_Have_to_Be_a_Specialist%3F

UK drivers using medical cannabis should know that the ‘in charge’ rules apply even when parked and charging an electric vehicle. The legal THC limit is 2 micrograms per litre of blood