Theresa May has called for tech firms to do more to tackle online extremism. Meanwhile in Germany new legislation is due to come into force next month that will mean the likes of Google and Facebook facing huge fines of up to 50m euros if they fail to remove extremist content. Markus Beckedahl is a prominent free speech campaigner and founder of the Netzpolitik blog.

Sam Baker edited some of Britain's biggest magazines - Just Seventeen, Cosmopolitan and Red - but then in 2015 jumped ship. She co-founded The Pool, an entirely digital publication, which today is experiencing steady growth.

The incident at Parsons Green prompted accusations that some journalists were behaving like "vultures". Members of the public who had posted photos and video from the scene soon found themselves swamped with requests from journalists. Steve Jones is the Press Association's Social Media Editor and Kaya Burgess is a reporter at The Times.

Presenter: Amol Rajan
Producer: Richard Hooper.