"Leave Before the Lights Come On" entered the UK Singles Chart at number four on 20 August 2006, becoming their first single not to top the chart. It did, however, reach number one on the Scottish Singles Chart, becoming their third consecutive number-one in that region.
In August 2006, "Leave Before the Lights Come On" entered the UK Singles Chart at position four but was not their top-selling single. Despite this, it reached number one on the Scottish Singles Chart and became their third consecutive number-one hit in that region.