Report · 2026
Report of the Public Inquiry into events at the Countess of Chester Hospital, 2015 to 2018
Our introduction
The report of the Thirlwall Inquiry, the public inquiry chaired by Lady Justice Thirlwall into events at the Countess of Chester Hospital from 2015 to 2018: a summary and three volumes. Its subject is not the criminal case, which the Chair writes was not her focus, but what the hospital's managers, the NHS and its regulators did when doctors raised concerns, and the 17 changes the Inquiry recommends.
Introduction by Reports that Matter, not part of the report. Only words in quotation marks are the report's own; every link opens them in context.
Background
In 2015 eight babies died on the neonatal unit of the Countess of Chester Hospital, against one to three a year from 2010 to 2014; five more died in the first half of 2016. Consultant paediatricians raised concerns about the deaths and collapses and their association with one nurse, Lucy Letby. She was moved off the unit in July 2016. The police opened an investigation in May 2017 and arrested her in July 2018. In August 2023 she was convicted of murdering seven babies and attempting to murder others, and in July 2024, at a retrial, of one further attempted murder; the Court of Appeal refused her permission to appeal.
Announced on 4 September 2023 and established on 19 October 2023, the Inquiry held public hearings from September 2024 to early 2025. The report was published on 15 September 2026 as four documents, all here: a summary report, Volumes I and II (Part One, the events at the hospital) and Volume III (Part Two, the wider NHS; Part Three, the 17 recommendations and the appendices). The summary numbers its chapters 1 to 4; the volumes' chapters run from 1 to 45. That day the Health and Social Care Secretary apologised on behalf of the government and the health service and said a full response would follow.
A public inquiry is not a court. The Chair makes findings on the balance of probabilities, and writes that her focus was not on Ms Letby's guilt or her convictions. She addresses the senior managers' submission that she should avoid hindsight, and in March 2025 refused four former senior managers' application to pause the Inquiry. The Criminal Cases Review Commission received an application on Ms Letby's behalf in February 2025 and said on 13 February 2026 that a review of her convictions is underway; it had announced no decision by 12 November 2026.
What it found
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The Inquiry finds that no one at the hospital seemed to understand that a concern about a nurse possibly harming babies was a safeguarding issue, and that the head of its safeguarding team made no safeguarding referral until March 2018. Safeguarding requires action on suspicion, the Chair writes, and those who raised concerns did not have to be sure; but staff training had not covered the possibility of a staff member harming children, and the senior managers who knew of the concerns did not apply the guidance. p. 35 p. 34 p. 35
“Throughout the evidence there was a real sense that people were reticent about saying anything for fear of being wrong. It seems to prevail over the fear of being right. That is why safeguarding legislation requires action on suspicion or concern rather than leaving it to the choice of the person who is concerned.”
p. 35 · Read in context → -
The report finds that the hospital's Board received no reports on the deaths of babies and children at any point in the period, which it calls "a serious failure of governance", and that the hospital's risk systems failed to protect the babies on the unit. p. 28 p. 40 p. 40
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The report finds that when consultants raised their concerns in 2016 the hospital's executives chose to wait and see, then shut the consultants out of the hospital's own investigations and treated them as the problem. A grievance process required two consultants to apologise to the nurse and to take part in mediation, on pain of disciplinary action; the Inquiry calls the way the grievance was handled "deplorable". p. 34 p. 37 p. 50 p. 50
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The Inquiry finds that the reviews the hospital commissioned could not answer the doctors' concern. The Royal College of Paediatrics and Child Health's then head of invited reviews accepted in evidence that its review should not have gone ahead, and the College's advice to hold an HR investigation was, in the Chair's words, "a serious misjudgement"; none of the reviews excluded deliberate harm. p. 41 p. 44 p. 47
“To recommend an HR investigation when concerns had been expressed about the deliberate harm and killing of babies was a serious misjudgement. What was needed was a police investigation, with police powers to search, seize phones, interview and so on.”
p. 44 · Read in context → -
The report finds that the police should have been told earlier than they were, and that the then Chief Executive's intention throughout was "to stall or obstruct a police investigation", which he did for almost a year, until May 2017. p. 61 p. 61
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The Inquiry heard from parents who were told nothing of the concerns until the police contacted them in July 2018; it finds that the hospital should have told them as soon as the police were notified, and that it shared their babies' medical records with reviewers without their consent. p. 61 p. 42 p. 45
“To the extent the executives thought about the parents at all, they considered it better to say nothing in the belief that the police investigation would lead nowhere. The parents should have been informed by the hospital as soon as the police were notified. They had a right to know.”
p. 61 · Read in context → -
The report also finds failings outside the hospital. The Care Quality Commission's inspectors did not see the data on neonatal deaths it held, the coroner's office did not have the hospital's own review of the deaths before it at an inquest, and NHS England's staff were too ready to accept the hospital's assurances, though the Inquiry places the principal responsibility for NHS England not knowing of the possibility of deliberate harm on the hospital's Chief Executive, Medical Director and Director of Nursing. p. 31 p. 52 p. 58
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In Part Two the Chair looks beyond the Countess. The Inquiry's review of 30 years of NHS inquiries finds that most of their recommendations have not been implemented, and she recommends that the National Audit Office audit them. She recommends in-cot cameras in every neonatal unit, a duty of candour for NHS managers, a barring system for managers that moves towards full regulation, and a protocol for suspicion of deliberate harm in every Trust, and finds that the NHS's move to a 'no blame' culture was a mistake. p. 63 p. 63 p. 64 p. 67 p. 66 p. 69 p. 67 p. 141
“The review shows that, whilst some significant changes have been introduced in response to inquiry recommendations over the last 30 years, most have not been implemented.”
p. 63 · Read in context →
Where to start reading
Short on time? These sections carry the report's argument. Each opens at the start of the section.
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1. Introduction
p. iii · Read →
The Chair on what the report is and is not, the hospital and its neonatal unit, and the number of deaths on the unit year by year. (The section opens with the report's cover and contents.)
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2. The babies
p. 6 · Read →
The account the Chair puts first, of the babies on the indictment and what happened to them, drawn from the medical records and the evidence of their parents.
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3. Concerns, reviews, errors
p. 27 · Read →
The core of the Inquiry's findings, month by month from June 2015 to the arrest in July 2018 and the Inquiry that followed, on what the doctors raised, how the executives, reviewers, coroner, regulator and NHS England responded, and how long it took to call the police.
“All the safeguarding guidance in the world makes no difference to the safety of babies if those to whom concerns are expressed do nothing.”
p. 35 · Read in context → -
4. Part Two
p. 63 · Read →
The Chair's summary of each chapter of Part Two, from medical examiners and insulin to the regulation of managers, the duty of candour and the Care Quality Commission, and what she recommends.
“If suspicions of murder have been raised in a hospital, the police must also be called.”
p. 68 · Read in context → -
Chapter 13. Why was action not taken sooner?
p. 234 · Read →
In Volume I, the Chair's own answer to the question in its title, from mid-June 2015 to mid-June 2016, on what the doctors, the senior nurses and the executives did with what they knew.
“Because it is too hard to accept, declaring something unthinkable avoids having to confront it.”
p. 234 · Read in context → -
Chapter 45. Recommendations
p. 141 · Read →
In Volume III, the 17 recommendations themselves, most with a deadline and each pointing to the chapter that gives the reasons, from in-cot cameras and insulin storage to a protocol for suspicions of deliberate harm.
Contents
- Contents Read →
- 2. The babies Read →
- 3. Concerns, reviews, errors Read →
- 4. Part Two Read →
- Contents Read →
- Chapter 1. Background Read →
- Chapter 2. The neonatal unit, 2015 to 2016 Read →
- Chapter 3. June 2015: Baby A, Baby B, Baby C and Baby D Read →
- Chapter 4. Risk and Patient Safety Department Read →
- Chapter 5. August to September 2015: Baby E, Baby F, Baby G and Baby H Read →
- Chapter 6. August 2015 to February 2016: Baby I and Baby J; concerns increase; reviews Read →
- Chapter 7. Care Quality Commission inspection, February 2016 Read →
- Chapter 8. February to April 2016: Baby K, Baby L and Baby M Read →
- Chapter 9. April to May 2016: The executives Read →
- Chapter 10. June 2016: Baby N, Triplets O, P and R Read →
- Chapter 11. 24 and 25 June 2016: Exchanges between the doctors and managers; Baby Q Read →
- Chapter 12. Safeguarding Read →
- Chapter 13. Why was action not taken sooner? Read →
- Chapter 14. Events at the end of June 2016 Read →
- Chapter 15. Early July 2016: Discussions; downgrade of the neonatal unit; Silver Command; risk and reputation Read →
- Chapter 16. Meetings on 13 and 14 July 2016 Read →
- Chapter 17. July 2016: Redeployment of and support for Letby Read →
- Chapter 18. Nursing and Midwifery Council Read →
- Chapter 19. Speak Out Safely Read →
- Chapter 20. The RCPCH review Read →
- Chapter 21. Reports: Dr Hawdon and Dr McPartland Read →
- Chapter 22. September 2016 to January 2017: The grievance Read →
- Chapter 23. January to March 2017 Read →
- Chapter 24. Referral of deaths to the coroner Read →
- Chapter 25. NHS England and the Countess Read →
- Chapter 26. Contacting the police Read →
- Chapter 27. Events in 2018; the Inquiry 2023 to 2026 Read →
- Chapter 28. The current position Read →
- Chapter 29. Bereavement care Read →
- Chapter 30. Parents' further recollections Read →
- Chapter 31. Implementation of recommendations of inquiries Read →
- Chapter 32. Medical examiners Read →
- Chapter 33. CCTV and monitoring Read →
- Chapter 34. Insulin Read →
- Chapter 35. Data – reading the signals Read →
- Chapter 36. The NHS Read →
- Chapter 37. Training and regulation of managers Read →
- Chapter 38. Duty of candour Read →
- Chapter 39. Culture of the NHS Read →
- Chapter 40. Freedom to Speak Up Guardians Read →
- Chapter 41. Patient safety, safeguarding and employment law Read →
- Chapter 42. Care Quality Commission Read →
- Chapter 43. The Health Services Safety Investigations Body Read →
- Chapter 44. Memorandum of Understanding Read →
- Chapter 45. Recommendations Read →
- Appendix 1. Terms of Reference Read →
- Appendix 2. Summary of Nuffield report on Inquiry questionnaire Read →
- Appendix 3. The Picker report Read →
- Appendix 4. Witnesses who gave oral evidence Read →
- Appendix 5. Chair's rulings Read →
- Appendix 6. Inquiry process Read →
- Appendix 7. Inquiry team Read →
- Appendix 8. Core Participants and legal representation Read →
- Appendix 9. Acronyms Read →