Driving on medical cannabis requires more than just a prescription. While a...

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

Driving on medical cannabis requires more than just a prescription. While a legal medical defence exists, you must remain under the 2µg/L THC limit and meet DVLA fitness to drive standards. Remember, legality isn't a safety guarantee