The Information Commissioner has announced she is opening a formal investigation into the use of data analytics for political purposes. Elizabeth Denham says there needs to be greater transparency around how personal data is used.

Michael Schmidt is the New York Times reporter behind what some in Washington are calling the scoop of the year. He tells Amol Rajan how he got it.

Users of BBC iPlayer will soon have to register and sign-in before using the service. Andrew Scott is Launch Director of the MyBBC and Toby Syfret is from Enders Analysis.

Presenter: Amol Rajan
Producer: Richard Hooper
Assistant Producer: Helen Fitzhenry.