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

https://paxtonsmasterinsight.opalvector.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 while parked and charging, the 2 micrograms per litre THC limit applies