Additional file 1: Appendix 1. Quantitative variables requested for the case study (not all were available in both Trusts). Appendix 2. Methodological details for qualitative interviews. Appendix 3. Number of reported readmissions of baby and mother based on incident reports (IR1s), quarterly totals for Trust A. Appendix 4. Number of reported incidences of undiagnosed SGA, Trust A IR1s (three monthly average).