Boris Johnson has been elected new Conservative leader. He will take over as prime minister from Theresa May on Wednesday. He says he will deliver Brexit and unite the country. But Boris Johnson is a divisive character. This episode is about the mistakes he’s made along the way, but why in the end his ambition and sheer force of personality got him there. He’s gone from being a journalist to celebrity to now the man with the top job in the country. We hear from the Radio 2 presenter Jeremy Vine, Kulveer Ranger who worked with him at City Hall and the BBC’s political correspondent Chris Mason.