From The Unthanks’ fifth album The Songs of Robert Wyatt and Antony & the Johnsons. “Shipbuilding” was written by Elvis Costello, and also covered by Robert Wyatt, June Tabor, and Costello himself on 1983’s Punch the Clock. Becky and Rachel Unthanks’ lovely chamber folk vocals are a perfect fit for Costello’s anti-war lyric. “Is it worth it?” the song begins. Listen.