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

https://super-wiki.win/index.php/Can_I_Drive_My_EV_the_Same_Day_I_Start_Prescribed_Cannabis%3F_The_Reality_of_Roadside_Law

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