I think that is too broad an interpretation of the guidelines curiosity.
They could phone the parent and inform them, the parent could say 'nah I wasnt going to do that' the phone are still able to inform ss of their concerns. Nothing has changed except the parents are kept informed of the process.
The guidelines are to protect children who have disclosed abuse and the act of informing the parents would be dangerous because they are likely to threaten, injure the child in revenge or to intimidate.
Schools and other agencies are supposed to act in partnership with families. The welfare of the child does come first but this does not automatically exclude the parents.
I have heard of schools doing this before. It happened to a friend of mine.
She had 5 children. They had all attended the same school over quite a few years. The family were well known and had never given cause for concern. During a discussion at school her daughter put her hand up and said 'my dad hits me with a big belt'
They went straight to social services without any contact with friend. Social services did the usual but protracted (lack of resources) investigation and found nothing amiss.
Friend was utterly traumatised. It took her years to get over it. It damaged her relationship with her DD for a while because she was so bewildered. DD didnt have a clue what had gone on because she didnt even remember making the comment.
The comment shouldve been investigated. But as the family were known and had given no cause for concern, the mother was in regular contac with the school, DD was known to make random remarks on a whole host of subjects but showed no signs of abuse or disturbance, I wouldve thought it far better to have a quiet word with mum. Explain concerns, give mum the chance to discuss what had happend and then involve ss if appropriate.
The school may have involved ss whatever mum said, to be on the safe side. But at least the family would have some idea of what was going on.
My DS told my friends OH that I punched him in the face over and over for not tidying his room. Imagine if he said that at school and they had a policy of involving SS automatically. How many of us would be under investigation on an almost continious basis?