In 2018, the UK updated the Misuse of Drugs Regulations 2001 to allow...

https://dlf-ne.org/what-international-treaties-affect-uk-cannabis-law/

In 2018, the UK updated the Misuse of Drugs Regulations 2001 to allow specialist doctors to prescribe cannabis-based products for medicinal use. Despite this change, cannabis remains a Class B drug for recreational use