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

https://foxtrot-wiki.win/index.php/Will_UK_Medical_Cannabis_Access_Keep_Expanding%3F_A_Realistic_Look_at_the_Landscape

Since 2018, specialist-prescribed medical cannabis has been legal in the UK. This guide explains eligibility after standard treatments fail, what consultations involve, and the reality of private versus NHS access