UK electric vehicle drivers using medical cannabis should be aware of 'in...

https://atomic-wiki.win/index.php/Can_a_Positive_Roadside_Swab_Be_Wrong_if_I_Used_Legal_CBPM%3F

UK electric vehicle drivers using medical cannabis should be aware of 'in charge' rules, which mean you can be tested even when parked and charging. The legal THC limit is just 2 micrograms per litre of blood