Age verification checks to prevent children from accessing online pornography is a breach of human rights, a UN official has warned.

Last year the Government announced that pornography websites that refuse to check ages before allowing people to watch explicit videos will be forcibly blocked.

In a bid to better protect children from viewing adult videos, Tory ministers have said that internet providers could face punishments if they fail to act on the demand for a site to be blocked by The British Board of Film Classification (BBFC), which regulates age verification.