Since 2018, medical cannabis has been a legal option for insomnia in the UK,...

https://tiny-wiki.win/index.php/Is_Medical_Cannabis_for_Insomnia_Meant_to_be_Used_Long-Term_in_the_UK%3F

Since 2018, medical cannabis has been a legal option for insomnia in the UK, prescribed by specialists only after other treatment pathways have been exhausted