This song started as a lyric Tom wrote when he was still living in Brighton on the South Coast of England before he moved to London. He explained to Artist Direct
: "It was literally about sirens and living in the city. I lived between a hospital and a police station so there were constant sirens. It explores the idea that when you live in a city, sirens become a sort of subconscious thing that eventually you come to ignore. There was a moment when I heard one, and it had a poignancy I'd never heard before. I tried to get that poignancy into a song. Although we come to ignore sirens in city, they're quite a cry. They represent something that doesn't relate to the songs you come to ignore. Essentially, something bad is happening. Someone is in trouble. For that one person, it means a lot more than it does to you. It's about being in a city. It's about being lonely. It's about trying to understand it. I had the lyric as a song idea, and I finished it off when I moved to London."