In the UK, medical cannabis for unlicensed specials follows strict MHRA...

https://brooksssuperop-ed.tearosediner.net/how-can-patients-feel-reassured-about-medical-cannabis-quality-in-the-uk

In the UK, medical cannabis for unlicensed specials follows strict MHRA oversight to ensure patient safety. Producers must meet Good Manufacturing Practice (GMP) and Good Agricultural and Collection Practice (GACP) standards