Since 2018, the UK has allowed medical cannabis as a regulated treatment...

https://www.bookmark-tango.win/since-2018-the-uk-has-allowed-medical-cannabis-to-be-prescribed-by-specialists

Since 2018, the UK has allowed medical cannabis as a regulated treatment option, prescribed only by specialist doctors. The National Institute for Health and Care Excellence (NICE) provides guidance based on available evidence to support safe use