The song cycle Happiness for soprano and orchestra was the last piece Waley-Cohen worked on with her teacher Oliver Knussen before his death in July 2018. It premiered at St Luke Old Street on 19 October 2018, played by the London Symphony Orchestra with soloist Lauren Fagan. Ink for large ensemble, recorded by the Philharmonia Orchestra on the NMC label, was inspired by the poetry collection Bottled Air by Caleb Klaces (who also provided the text for Linea). Changeling, a 10-minute work for chamber orchestra, was commissioned by the Los Angeles Philharmonic and premiered on 1 June 2019 by the LA Phil New Music Group at the Walt Disney Concert Hall, conducted by John Adams.
