Prescribed cannabis? You have a medical defence against the 2mcg/L limit, but...

https://evpowered.co.uk/feature/medical-cannabis-and-uk-driving-laws-what-ev-owners-must-know/

Prescribed cannabis? You have a medical defence against the 2mcg/L limit, but legality isn’t a free pass. You must still meet DVLA fitness requirements. Remember: your duty to drive unimpaired remains absolute