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

https://blogfreely.net/gertonmhvf/why-do-clinicians-look-at-the-bigger-picture-not-just-your-sleep

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.