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

https://weekly-wiki.win/index.php/Is_Medical_Cannabis_Legal_for_Insomnia_in_the_UK%3F

Since 2018, medical cannabis has been legally available in the UK via specialist prescription. Usually considered only after other treatments fail, it isn't a guaranteed fix. Because individual responses vary, talking to a clinician is key.