WOW – Women of the World festival celebrates women and girls, and looks at the obstacles that stop them from achieving their potential. Why is gender equality taking so long to achieve? Southbank Centre's festival is a global network of festivals which provides a platform for interrogating this question. WOW 2017 speakers included Angela Davis, Chimamanda Ngozi Adichie, Gemma Cairney, Sandi Toksvig and Gillian Anderson.