Complex sentence: The latter reached number eight on the UK Singles Chart after "The X Factor" 2010 winner Matt Cardle covered the song, and became the UK number one Christmas single for the year of 2010.
Split into simpler sentences: The latter reached number eight on the UK Singles Chart after "The X Factor" 2010 winner, Matt Cardle covered the song. It became the UK number one Christmas single for the year of 2010.