Since 2018, medical cannabis has been legal in the UK via specialist...

https://www.bust-bookmark.win/since-2018-medical-cannabis-has-been-a-legal-treatment-option-for-insomnia-in

Since 2018, medical cannabis has been legal in the UK via specialist prescribing. Usually considered only after other insomnia treatments have failed, it is not a quick fix. As with any clinical care, individual patient experiences vary widely.