Since 2018, medical cannabis has been available through regulated specialist...

https://www.bookmark-help.win/since-2018-medical-cannabis-has-been-a-legal-treatment-option-in-the-uk-when

Since 2018, medical cannabis has been available through regulated specialist prescribing in the UK. For those living with insomnia, it is typically considered only after conventional treatment pathways have been explored and proven ineffective