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

https://wiki-quicky.win/index.php/Do_UK_patients_use_medical_cannabis_when_other_treatments_fail%3F

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