There is a direct link between possessing child abuse images and carrying out sexual attacks on children, a specialist police child protection unit has said.
The report carried out by The Child Exploitation and Online Protection (Ceop) "highlights the need to consider each possession offender as a potential contact offender to some extent."
A study of almost 100 case studies from 34 forces found offenders who both possessed child abuse images and attacked children were "almost exclusively white males", with most aged between 19 and 45.
Those not in work, and possibly therefore those with high levels of internet usage, those working in schools or care work, and those in manual and manufacturing jobs made up most of the sample, the report said.
More top news
The investigation into the cause of the Virgin Galactic spaceship crash in October last year is due to give its verdict today.
With life in the city offering little security, for some Greeks life in the country has suddenly become a good place to be.
Two young women took on a challenge of the "mind and heart" to become first-ever Afghan women's team to conquer a 250km endurance race.