Child protection expert Mark Williams-Thomas said the Prime Minister should be clear that today's announcement is more about stopping children and young people accessing child abuse images "rather than tackling offenders accessing this material".
However, Mr Williams-Thomas acknowledged on Twitter that it was "a good step forward":
Criminologist and child protection expert Mark Williams-Thomas told Daybreak: “They were living with him and did not know. They really were living with a monster.
"And for anyone outside who says ‘why did you not know? Why did you not see what was going on?’ I can completely understand. I’ve spent a lot of time with the family, I’ve spoken to the people who knew him and I tell you what he was a normal person.”