About a year ago, I was sitting at my house in England, and [Cregan] came around and said, 'Come on, let's try to write a song,' ... And I said, 'No, I can't be bothered. Those days are over.' But we sat down, I started humming a melody and he took it away and sent it back and said, 'Listen, this is pretty good,' so I wrote some words for it and ever since then it's just been flowing like a river.