Medical cannabis has been legal in the UK since 2018, but it requires...

https://astrodud.io/medical-cannabis-for-sleep-disorders-what-uk-patients-experience/

Medical cannabis has been legal in the UK since 2018, but it requires specialist oversight and isn't a first-line treatment. Experiences vary, but some people find it helps them wind down or reduces night wake-ups. Always consult your GP first.