UK EV drivers using medical cannabis should be aware of the ‘in charge’ rules....

https://emilianoakpv703.wpsuo.com/why-can-i-feel-fine-but-still-be-over-the-2-micrograms-thc-limit

UK EV drivers using medical cannabis should be aware of the ‘in charge’ rules. Even when parked and charging, the 2 micrograms per litre THC limit applies, so a roadside swab could trigger a blood test