Pakistanis.
They have been running a child sex ring up in Rothenham for ten years. More than 1500 children, mostly girls, have been exploited.
Link:
http://www.telegraph.co.uk/news/uknews/crime/11057647/Rotherham-sex-abuse-scandal-1400-children-exploited-by-Asian-gangs-while-authorities-turned-a-blind-eye.html