The first single, "Mary's Prayer", written by Clark, was a worldwide hit, reaching number 3 in the UK Singles Chart,[1] and number 23 on the United States Billboard Hot 100 chart, earning him a BMI award,[2] and a nomination for an Ivor Novello award for Best Song Musically and Lyrically.
[4] Clark then formed a rock band called King L (with bass player Eric Pressly, former Bible guitarist Neill MacColl and drummer Matt Laug).
[6] Clark's collaboration with Natalie Imbruglia began when he and Eric Pressly re-mixed the single "Wishing I Was There" from her Left of the Middle album.
[9] In 2012, he co-wrote and produced 10 songs on Delta Goodrem's Child of the Universe, including the single "Wish You Were Here",[10] which reached No.
Clark co-wrote The Veronicas' song "Cold"[11] and co-composed and co-performed the music on the 2016 film Sing Street.