Influenced by Free, The Faces, and the songwriting of Van Morrison and Elton John, Allen has a profound love for American music, though his sensibilities have crafted a distinctively British sound. A gifted songwriter with a whisky-soaked voice that has become his trademark, Allen's career took off with his album Dead Man’s Suit, which led to an appearance on BBC's Jools Holland early in his career.

With a music catalogue spanning six albums, Allen streams worldwide across all platforms, amassing over 30 million streams on Spotify. He tours with his band, The Luna Kings, and is currently working on his seventh album.