If you need a DBS then it needs to come from the schools process, you don't generally get a 'generic' one and then use it as and when. It needs to be specific to the volunteering role in question.
I can sort of see the need - I guess the school have to consider the other kids and their parents.
That said seems odd that things have escalated to this extent for a nine year old.
Probably best just to drive him yourself at this stage
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