The word 'fat' has been removed from a new range of Roald Dahl books. It's a sign our conversation about obesity and body image has become increasingly sensitive.

Many body positivity activists have reclaimed the word 'fat' while promoting more diversity in the body shapes and sizes we see in our media. But some accuse the movement of denying the health risks associated with being overweight. Is it true we can be healthy at any size? Where did the body positivity movement come from? And should we be worried about the return of size 0 fashion?

Presenter: Adam Fleming Producers: Lucy Proctor, Phoebe Keane and Ellie House. Editor: Emma Rippon