Blunt said on VH1's The Vspot that he wrote this song about seeing his ex-girlfriend with a new man who he didn't know about on a train in the London underground. He says that they shared a lifetime in the brief eye contact. The words came to him all at once. The girl that inspired this song is Dixie Chassay, who works in the casting department on films. Blunt mentions her in the thank you note on his first album.














