Since becoming legal in the UK in 2018, medical cannabis has been available...

https://kilo-wiki.win/index.php/Understanding_the_Path_to_Medical_Cannabis_in_the_UK:_A_Step-by-Step_Guide

Since becoming legal in the UK in 2018, medical cannabis has been available under strict specialist oversight. It is never a first-line treatment for sleep issues and should only be discussed once standard approaches have been tried