The father of a 14-year-old girl who took her own life says she was repeatedly targeted by anonymous bullies online.
Hannah Smith died on Friday in Lutterworth in Leicestershire. Her dad is now calling for ask.fm to be closed down. Vivian Pattison runs the Children and Families Media Education Trust, which goes into schools. She tells Premier parents and children both have a role to play in dealing with online bullying:
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Jamie Cutteridge works for Youthwork magazine.
He told Premier's News Hour what his advice would be for parents who are worried about teenagers online:
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