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

https://kameronssuperbjournals.brightsora.com/posts/will-officers-recognise-what-a-cbpm-prescription-looks-like

UK EV drivers using medical cannabis should be aware that ‘in charge’ rules apply while parked and charging. The legal THC limit is 2 micrograms per litre of breath and a positive roadside swab can trigger a blood test, even if you hold a prescription