In the row about child sexual exploitation by gangs - particularly those made up of Pakistani heritage men - some people have begun to question the value of multiculturalism. Shadow Justice Secretary, Robert Jenrick, suggested the law had been applied selectively against grooming gangs "to sustain the myth that diversity is our strength." So what do we mean when we talk about multiculturalism in modern Britain, where did the concept first come from, and what is the evidence that it is a source of strength or weakness? Plus, to explore the complexities in this area, we look at the anguish around one particular idea - Islamophobia.

Presenter: Adam Fleming