Prescribed medical cannabis doesn’t grant a free pass on the road. While a...

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

Prescribed medical cannabis doesn’t grant a free pass on the road. While a medical defence exists for the 2mcg/L THC limit, you must remain fit to drive and disclose relevant conditions to the DVLA. Remember: a legal prescription is not a safety waiver