In 2018, the UK updated the Misuse of Drugs Regulations 2001—not the 1971...

https://high-wiki.win/index.php/077_What_Actually_Changed_in_the_UK_Cannabis_Law_in_No

In 2018, the UK updated the Misuse of Drugs Regulations 2001—not the 1971 Act—to allow specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex under Schedule 2. Recreational cannabis remains a Class B drug