Since 2018, medical cannabis has been legal in the UK for specific sleep...

https://smoothdecorator.com/medical-cannabis-for-sleep-disorders-what-questions-should-you-ask-a-clinic/

Since 2018, medical cannabis has been legal in the UK for specific sleep conditions, though it is never a first-line treatment. With mandatory specialist oversight, patients may find support for winding down or fewer night wake-ups