Complex sentence: It was the second biggest-selling single of 2005 in the UK, and, is the 69th biggest selling single in the UK, having sold 1.1 million copies as of November 2012.
Split into simpler sentences: It was the second biggest-selling single of 2005 in the UK, and, is the 69th biggest selling single in the UK. It has sold 1.1 million copies as of November 2012.