Children should be taught about the dangers of pornography as part of sex and relationships education (SRE) at primary school, a cross-party committee of MPs has said.

The call emerged as a report warned that increasing access to online pornography is fueling sexual harassment and sexual violence in schools, with previous research indicating that almost one in ten children first viewed porn when they were under 10 years old.

The research also found that 62 per cent of the youngsters who had viewed porn online at 14 years of age or younger, had done so by accident or because they had been shown it by someone else.

MPs said that pornography is increasingly informing children's views about sex, as the number of referrals of children with porn addictions - including boys and girls aged only eight - is increasing.

Maria Miller, MP and chair of the Women and Equalities Select Committee, which published the report, said: "The guidance that is currently in place in schools pays no heed at all to the role of pornography, probably because it hasn't been revised for 16 years, when there was no online pornography to be had.