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

https://daltonsnewdigests.talesignal.com/posts/does-the-uk-medicines-regulator-approve-most-cannabis-products

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