Since 2018, specialist-prescribed medical cannabis has been a legal UK option....

https://soulinner.com/can-medical-cannabis-actually-help-uk-insomnia-sufferers/

Since 2018, specialist-prescribed medical cannabis has been a legal UK option. For insomnia, it’s typically considered only after other treatments fail. Outcomes vary significantly, so consult a clinician to see if this pathway is right for you.