Since 2018, medical cannabis has been a legal but strictly regulated treatment...

https://foxtrot-wiki.win/index.php/Medical_Cannabis_for_Sleep:_What_If_I_Have_Tried_CBT-I_and_Still_Wake_Up%3F

Since 2018, medical cannabis has been a legal but strictly regulated treatment option in the UK. It is never a first-line therapy and always requires oversight from a specialist doctor