Since 2018, medical cannabis has been legally available in the UK through...

https://wiki-aero.win/index.php/Why_Do_Some_People_Struggle_to_Stick_With_CBT-I_Routines%3F

Since 2018, medical cannabis has been legally available in the UK through specialist prescription. For those managing persistent insomnia, it is typically considered only after standard, evidence-based treatments have been exhausted or proven ineffective