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

https://kameronssuperbjournals.brightsora.com/posts/are-prescriptions-from-outside-the-uk-valid-for-medical-cannabis-here

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