The absence of a child from a conventional school environment where staff are routinely trained in safeguarding responsibilities can in some circumstances lead to that child being in a more vulnerable situation and at a higher risk of neglect or abuse.
Oh really, evidence please. Have they been nobbled by the NSPCC maybe?
Guess what, they don't have any, they are going on a few high profile cases in the media, which as we know were exploited for political purposes and nothing to do with home education. Oh and lets lump in disability and private fostering too, everybody knows children in these situations sometimes are victims of abuse don't they. Unlike children in schools and state care, so safe they are.
As Ali says
Child Risk Assessment Matrix