The designer catwalk and the glossy magazine cover are powerful cultural signifiers. Top models who occupy those spaces are deemed to have a look that attracts and sells. But how diverse is that look? How inclusive? Stephen Sackur interviews Halima Aden, a supermodel who challenged a host of stereotypes. She is a refugee from Somalia’s civil war; she’s Muslim and follows a modest dress code. Hers has been an extraordinary journey to international fame and fortune - how has it changed her?