Lisa Harker, head of strategy at the NSPCC, welcomed the announcement of plans to log children's visits to A&E on a national database.
She said: "NHS doctors and nurses are often in the frontline of child protection and play a crucial role in identifying abuse victims as quickly as possible.
"So this new system for sharing information about children at risk should prove an important aid."
More top news
A GoFundMe page was set up by the children's uncle to raise £15,000 for their funerals.
Lindsay Hoyle said his "family will never be the same" after the death of his 28-year-old daughter Natalie.
Police say they have traced four drivers who are thought to have hit the woman, and added that a fifth vehicle may also have been involved.