In the inaugural Steve Hewlett Lecture at the Royal Television Society, Nick Robinson argues how the BBC should respond to the popularity of hyper-partisan news sources. Anoosh Chakelian is a senior writer at the New Statesman and Alex Wickham blogs as Media Guido.Twitter has announced that it is increasing the number of characters allowed in a Tweet. It used to be 140 - in line with old fashioned SMS text messages - but now it is going to experiment with 280 characters. Piers Morgan thinks it is a bad move whilst technology journalist Kate Bevan explains the business rationale.BT Sport has become a serious rival to Sky in the market for live sport. Amol visits its giant studio in East London and meets Simon Green, Head of BT Sport.Presenter: Amol Rajan Producer: Richard Hooper Assistant Producer: Amy Irvine.