The Health Behaviour in School-Aged Children (HBSC) report, due to be published in the autumn, will reveal that of the 6,000 young people aged 11, 13 and 15 surveyed across England – up to one in five 15-year-olds say they self-harm.

http://www.theguardian.com/society/2014/may/21/shock-figures-self-harm-england-teenagers