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

https://dlf-ne.org/what-is-the-biggest-mistake-prescribed-patients-make-at-charge-points/

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