Speaking about the song, Gillespie has said that "I wrote it whilst sitting in Glasgow Green on a really lovely sunny day.

As such, Gillespie cut a new version of the song for the album, adding fuller instrumentation with prominent drum and bass lines.

Filmed with a green screen, Gillespie said afterwards she did not enjoy the experience much: "I had to lie on the floor from eight in the morning till 11 at night.

The original acoustic version of "This Day" was released the same night she performed it on Must Be the Music, and quickly escalated the UK charts.

The re-recorded version, which drew some criticism for eliminating the simplicity of the song, substituting it with "anodyne strings" and "innocuous, featureless arrangements".