Complex sentence: Henderson succeeded in gaining a scholarship and boarded at the school from the age of 11 to 16 and attended the school at the same time as Dan Ferrari-Lane of boy band District3, who was on "The X Factor" with Henderson in 2012.
Split into simpler sentences: Henderson succeeded in gaining a scholarship and boarded at the school from the age of 11 to 16. She attended the school at the same time as Dan Ferrari-Lane of boy band District3, who was on "The X Factor" with Henderson in 2012.