UK EV drivers prescribed medical cannabis should know 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 prescribed medical cannabis should know the ‘in charge’ rules mean you can be tested even while parked and charging. A roadside swab can detect THC, and if over 2 micrograms per litre in blood, it risks prosecution