Since 2018, medical cannabis has been a legal, specialist-led option in the UK....

https://www.toro-bookmarks.win/since-2018-medical-cannabis-has-been-a-legal-option-in-the-uk-when-prescribed

Since 2018, medical cannabis has been a legal, specialist-led option in the UK. It is typically reserved for cases where other treatments have failed. As with any sleep intervention, results vary significantly between individuals