Internet safety: Teenage daughter groomed online
Around half of 15 to 17-year-olds have accessed pornography on a smartphone or tablet, according to a survey.
The poll, carried out by the mental health charity Young Minds, also suggests a third of 11 to 14-year-olds had watched porn on a mobile device.
A mother describes teenage daughter's experience of being groomed online by grown men. We have re-voiced the interview to protect her identity.