Prescribed medical cannabis doesn’t grant EV drivers an automatic exemption...

https://www.pfdbookmark.win/prescribed-cannabis-and-driving-a-medical-defence-exists-for-the-2mcg-l-thc

Prescribed medical cannabis doesn’t grant EV drivers an automatic exemption from UK road laws. While a medical defence exists for the 2mcg/L THC limit, you must still satisfy strict DVLA fitness-to-drive requirements