Two or four coroner's inquests were pending - Child C, Child D, and the coroner had agreed to wait for the outcome of the RCPCH review before deciding if children O and P should have them too.
The RCPCH review (via Jane Hawdon) determined that children O and P suffered failings in care that had likely contributed to their deaths, so presumably the coroner would have granted this.
There were clear failings in care for child D and her mother, and the hospital later received legal advice that they would not be able to defend their care in this case. But by then the coroner's inquest was suspended and it never happened.
Jane Hawdon had identified significant failings in care for child C too, as has the expert panel for all four children.