In-depth investigation and analysis of the stories behind the day's headlines. With Gavin Esler.
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Stella Creasy and Toby Young on what to do about trolls on the social networking site.
Paul Mason talks to trolls and to people finding tech solutions for dealing with them.
Del Harvey, Twitter Head of Trust and Safety, says company takes abuse problem seriously.
Musician, campaigner and former culture minister discusses the situation in his country.