Prescribed medical cannabis is legal, but for UK drivers, the 2μg/L THC limit...

https://telegra.ph/Can-I-Drive-My-EV-the-Same-Day-I-Start-Prescribed-Cannabis-The-Reality-of-Roadside-Law-04-23

Prescribed medical cannabis is legal, but for UK drivers, the 2μg/L THC limit remains. While a medical defence exists, it doesn’t override DVLA fitness-to-drive requirements