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

https://bizzmarkblog.com/is-cannabis-decriminalised-anywhere-in-the-uk/

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