In 2018, UK cannabis law changed through an update to the Misuse of Drugs...

https://www.bookmarking-online.win/uk-cannabis-laws-were-adjusted-in-2018-through-the-misuse-of-drugs-regulations

In 2018, UK cannabis law changed through an update to the Misuse of Drugs Regulations 2001—not the Misuse of Drugs Act 1971—allowing specialist doctors to prescribe cannabis-based medicines under Schedule 2