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

https://beauoynz053.lucialpiazzale.com/what-does-it-mean-that-cannabis-remains-controlled-in-the-uk

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