In 2018, UK cannabis laws changed through the Misuse of Drugs Regulations 2001,...

https://mike-wiki.win/index.php/What_Is_Sativex_and_Who_Can_Get_It_in_the_UK%3F

In 2018, UK cannabis laws changed through the Misuse of Drugs Regulations 2001, allowing specialist doctors to prescribe certain cannabis-based medicines like Sativex and Epidyolex. Despite this, cannabis remains classified as a Class B drug for most uses