Medical cannabis is legal, but driving remains a minefield. With a 2μg/L THC...

https://bizzmarkblog.com/the-motorists-guide-to-medical-cannabis-dvla-rules-section-5a-and-staying-legal/

Medical cannabis is legal, but driving remains a minefield. With a 2μg/L THC limit, a prescription offers a potential medical defence, yet it doesn’t bypass DVLA fitness-to-drive requirements