Medical cannabis has been legal in the UK since 2018 for specific conditions,...

https://wiki-global.win/index.php/Why_Do_Treatments_Help_Temporarily_But_My_Sleep_Pattern_Comes_Back%3F

Medical cannabis has been legal in the UK since 2018 for specific conditions, though it remains a last-resort option requiring strict specialist oversight. It is not a first-line treatment and patient responses vary significantly