A national video campaign has been launched to encourage people who view images of child sexual abuse online to seek help.

The initiative is modelled on anti-drink drive and anti-knife crime campaigns.

Campaigners say the aim is to protect children, by urging men and women who look at such material to seek therapy and counselling.

One man who admits he was ''addicted'' to pornography involving children has spoken anonymously to the BBC's Angus Crawford.

He said it was vital that abusers spoke to somebody before addiction took hold.

The Lucy Faithfull Foundation (LFF), is behind the campaign and offers support to those seeking help.