When this interview was recorded in August 2015 Andrew was a prince and a duke living in a very big house. That is now history.

Andrew Lownie has spent four years researching the lives of Andrew Windsor and Sarah Ferguson, who used to be the Duke and Duchess of York.

The book is full of dramatic details of lives spent sailing very close to the wind but mostly protected by their royal status. Not anymore.

What Andrew Lownie tells me will stop you in your tracks.