Having a medical cannabis prescription isn’t a free pass to drive. While a...

https://iris-wiki.win/index.php/If_I_Get_Pulled_Over,_What_Do_I_Say_About_My_Prescription%3F_A_Guide_for_Medical_Cannabis_Patients

Having a medical cannabis prescription isn’t a free pass to drive. While a medical defence exists for the 2mcg/L THC limit, you must still meet DVLA fitness-to-drive standards