Another line of inquiry is to investigate how health systems perform in tackling conditions that are treatable, comparing death-rates for such illnesses among the under-75s.
She told the inquiry that, after Raychel's death, new systems were introduced which have clarified the procedure around prescribing fluids for children coming out of surgery.
The inquiry is currently working from a temporary base in Sale, Greater Manchester, while secure IT systems are installed in the Warrington office so staff can assess more than 450, 000 documents relating to the disaster.