For EV drivers using medical cannabis, legality isn't a free pass. You still...

https://bizzmarkblog.com/the-motorists-guide-to-medical-cannabis-dvla-rules-section-5a-and-staying-legal/

For EV drivers using medical cannabis, legality isn't a free pass. You still need to meet DVLA fitness standards and stay under the 2μg/L THC limit to use the medical defence. Remember: a legal prescription doesn’t override your duty to drive unimpaired.