The UK Dance Chart is a weekly chart that ranks the biggest-selling dance singles in the United Kingdom, and is compiled by The Official Charts Company. The dates listed in the menus below represent the Saturday after the Sunday the chart was announced, as per the way the dates are given in chart publications such as the ones produced by Billboard, Guinness, and Virgin. In 2006, the chart was based on sales of CD singles and 12-inch singles, and was published in the UK magazines ChartsPlus and Music Week and on BBC Radio 1's official website. During the year, 31 singles reached number one.