I caught this feature (early part of the programme) on Radio 4 last night and again today. Very salutary!
Incidentally, the QCA's definition of "scaffolding" is not, as I understand it, the same as Bruner's use of the term.
But the item did present a challenge; perhaps I should re-write all this current validation documentation in plain English, with no jargon whatever. Would it then be longer or shorter?