A study lays bare the devastating impact of chronic bullying and has led to calls for more support for affected children, families and schools.

The research, led by the University of York and the charity Kidscape, involved 18 families with children who have experience of chronic bullying. All of the children - aged between 8 and 18 - were found to have clinically relevant symptoms of trauma. For 78% of the children the bullying was still ongoing.