What does Jo Johnson’s resignation mean for his brother’s government?

Hugo Dixon who is an old school friend of Boris Johnson and he’s known Jo Johnson also for many years. He is now the Deputy Chair of the People’s Vote campaign.

Fraser Nelson is editor of the Spectator magazine, a position Boris Johnson once occupied.

And Sonia Purnell, who wrote Mr Johnson’s biography “Just Boris – A Tale of Blond Ambition”, used to work with him at the Daily Telegraph’s bureau in Brussels.