The One Direction song "Moments' was written by an English singer-songwriter. Who?

Explanation

The One Direction debut single "What Makes You Beautiful" entered the UK Singles Chart at number one selling a total number of 153.965 copies in its first week. Addionally it smashed the pre-order sales record at One Directions label Sony Music. Their debut album "Up All Night" was with 468.000 copies the 16th biggest selling album of 2011 in the UK.