A survey by Barnardo's has found that nearly half of people in the UK think children are angry, violent and abusive, with a quarter thinking they are beyond help by the age of 10. Mark Hutchings went to meet some teenagers from Glyn Derw in a deprived part of Cardiff. Anne Marie Carrie of Barnardo's and Nirpal Bhogal, writer and director of film Sket about girl gangs in London, debate the problem.

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