In 2018, UK cannabis law was updated through changes to the Misuse of Drugs...

https://www.bookmarking-presto.win/since-2018-uk-cannabis-law-has-changed-under-the-misuse-of-drugs-regulations

In 2018, UK cannabis law was updated through changes to the Misuse of Drugs Regulations 2001—not the Misuse of Drugs Act 1971—to allow specialist doctors to prescribe cannabis-based medicines listed under Schedule 2