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

https://touch-wiki.win/index.php/If_I_sleep_the_same_hours,_why_do_I_feel_better_on_some_days%3F

Since 2018, specialist-prescribed cannabis has been a legal option in the UK. It is usually considered for insomnia only after other evidence-based treatments have been exhausted