Sienna Spiro is about to hit the big time. On the eve of her debut album Visitor, the Londoner is on a fast track to becoming the UK’s latest breakout superstar, powered by her inimitable voice, Spotify Global Chart Top 10 viral smash Die On This Hill and a growing legion of followers. Behind the numbers lurks a remarkable story, as Spiro tells Music Week. Joined by co-manager Miriam Maslin, Capitol Music Group CEO and chairman Tom March and the ...