What does Theresa May want?

Theresa May's new book, Abuse of Power, will not be a gossip-fuelled account of her time in No. 10. Instead, it'll be an account of how powerful people make mistakes, and how institutions corrupt. What's the point of the book, and has the former Prime Minister landed on a real, punishing problem in British politics?

Kate Andrews speaks to Fraser Nelson and Gavin Barwell, Theresa May's former chief of staff.