In 2018, UK cannabis laws were updated through changes to the Misuse of Drugs...

https://cristiansuniquejournals.cloudhinter.com/posts/why-does-uk-medical-cannabis-rely-on-private-clinics-so-much

In 2018, UK cannabis laws were updated through changes to the Misuse of Drugs Regulations 2001—not the 1971 Act—to allow specialist doctors to legally prescribe cannabis-based medicines