Question to the Home Office:

To ask the Secretary of State for the Home Department, what estimate she has made of (a) the number of images which will be transferred from the National Hash Set Database to the Child Abuse Image Database and (b) the number of those images which have been verified by three experts.

At its launch, the Child Abuse Image Database (CAID) contained around 4.4m unique images. This includes every file from the Cheshire Constabulary image library, which sits alongside the interim National Hash Set Database, that has been graded as an indecent image of a child or related material by at least one police force - around 3.53m images. Approximately 870,000 additional images which did not previously appear in the Cheshire library have been provided by other police
forces.

All 4.4m images appearing on CAID have an indicative categorisation based on police force grading. At present, the number of these images that have three independent, undisputed votes is approximately 600,000. This figure will
increase as the database is used by more forces.