“Five albums in, everyone who likes Coldplay or doesn’t like Coldplay, is kind of used to the singer, so the challenge is to try and keep it interesting for the listener. When someone’s on their first album, everyone is just excited by the sound of their voice, whether it’s Amy Winehouse or Adele or Bono or whoever it is, when it’s a fresh voice. By the fifth album, everyone takes that bit for granted.”