If shilding is to protect the vulnerable children then why do the children of all politicians need to be shielded? Is it because they are at risk or because the parents (politicians) do not trust the security of the system?
Re Victoria C and Baby P both these cases ended the way they did because of the failure of people in the same authority, and even in the same office, to talk to each other. How is a national database going to help that? Why does expensive and complex IT need to be deployed to correct a problem that is caused by people not being able to communicate at the most basic level - speech?
I know from personal, front line, experience with abused children many so called professionals in this field could not give a rats arse about the children until the wheels come off the wagon and then it's all scrabble 'round to protect their own arses. The few dedicated care professionals in child care are driven out of the job by the constantly increasing workload and management's only interest in "performance" figures. Those that stay are either masochists or could not get a job flipping burgers in the real world.
So this childrens version of the ID database will still not save lives, it is just there to show that this gov.uk is "doing something for the children".