Legally prescribed cannabis doesn’t grant a free pass on the road. While...

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

Legally prescribed cannabis doesn’t grant a free pass on the road. While there’s a medical defence for the 2 micrograms per litre THC limit, you must still meet strict DVLA fitness-to-drive standards