In 2018, UK cannabis regulations shifted through changes to the Misuse of Drugs...

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

In 2018, UK cannabis regulations shifted through changes to the Misuse of Drugs Regulations 2001—not the Misuse of Drugs Act 1971—allowing specialist doctors to prescribe certain cannabis-based medicines