Since 2018, the Misuse of Drugs Regulations 2001—not the 1971 Act—allow...

https://kilo-wiki.win/index.php/What_Does_Marketing_Authorisation_Mean_for_a_Cannabis_Medicine_in_the_UK%3F

Since 2018, the Misuse of Drugs Regulations 2001—not the 1971 Act—allow specialist doctors in the UK to prescribe certain cannabis-based medicines, like Sativex and Epidyolex. However, cannabis itself remains a Class B drug, keeping most uses illegal