err there is already one planned bigger than this for children
Its called ContactPoint - it is designed to hold every child from 0-18 with unique ids in it.
http://www.everychildmatters.gov.uk/deliveringservices/contactpoint/about/
"Information held on ContactPoint
ContactPoint will only hold the following basic information for all children in England (up until their 18th birthday)
* Name, address, gender, date of birth and a unique identifying number.
* Name and contact details for a child's parent or carer.
* Contact details for services working with a child: as a minimum, educational setting (e.g. school) and GP practice, but also other services where appropriate.
* A means to indicate whether a practitioner is a lead professional and if they have undertaken an assessment under the Common Assessment Framework.
Those providing a sensitive service (those in the fields of sexual health, mental health and substance abuse) will be required to seek informed, explicit consent before recording their contact details on ContactPoint. Where they are recorded, only an indication of an unspecified service would be visible.
Informed, explicit consent will also be required for care leavers or those with learning difficulties to remain on ContactPoint up to age 25, to facilitate the transition to adult services.
ContactPoint will not hold:
* any assessment or case information
* details such as birth weight, exam results, medical records, or diet
* subjective information about a child or their parent
The information that can be held on ContactPoint is limited by law as provided by Section 12 of the Children Act 2004 and the supporting Regulations"
Someone might like to talk over the cabinet office table...