In her Brexit speech in Florence on Friday Theresa May will explain what she wants and how she plans to get it. A local man once had a few ideas about all this. Author of Be Like the Fox: Machiavelli's Lifelong Quest for Freedom, Erica Benner, explains what tips Machiavelli might have given to improve the credibility and respect of the prime minister. (Image: Theresa May/Niccolo Machiavelli. Credit: Reuters/Getty Images)