Sarah Kane revolutionised British theatre with five provocative plays written between 1995 and 1999. Her final work, 4.48 Psychosis, was her most personal, confronting the clinical depression she struggled with for years. The play was first performed posthumously in 2000, after she died by suicide in 1999.The Royal Opera and Guildhall School of Music and Drama commissioned Philip Venables to adapt the play as an opera, which debuted in 2016. The composer, also known for a certain “in-yer-face” approach, set Kane’s original text almost entirely, realising its 24...