He nominated Cyril Smith for a peerage after deciding allegations against him were "past history" – something that drew criticism from the Independent Inquiry into Child Sexual Abuse.
MPs were protected from prosecution in "a consistent pattern of failures to put the welfare of children above political status" – but inquiry finds no evidence of an organised paedophile ring.
Some of the victims were as young as 13. Police say there could be as many as 50 of them.
Angela Allen, who pleaded guilty to four child sex assaults, has been deemed no longer a significant risk to the public.
The mother-of-two was jailed in 2009.
Operational experts say the figure is a conservative estimate.
"You just never know if your child is a target or not," says the Film and Publications Board's Manala Botolo.
Disturbing technological advances are revolutionising the underground sex industry - and provoking strong debate.
Until we can assess the level of risk each paedophile caught with child abuse images poses, and find proven ways of preventing paedophiles from accessing child abuse images and assaulting children in the real world, we should think twice before removing what is currently the only barrier we have to protect children from unthinkable harm.
Let me start by being really clear, that all child sexual abuse needs to be stopped. That includes everything: from inappropriate sexual conversations with children, sexual behaviour in the presence of a child through to looking at child abuse images and contact offences with children.