The Thirlwall inquiry into the Lucy Letby case has left the biggest questions unanswered, raising profound concerns about justice and systemic failures. Lady Justice Kathryn Thirlwall's investigation, launched in 2023, was tasked with examining the events at the Countess of Chester Hospital and the management culture that allegedly allowed Letby to harm babies. Yet, as the inquiry progresses, many experts argue that it has sidestepped the most critical issue: whether Letby is actually guilty.
The Scope of the Thirlwall Inquiry
The inquiry was established by then Health Secretary Steve Barclay on the premise that Letby murdered seven babies and attempted to murder seven more. Its terms of reference focused on the hospital's management and whether their actions contributed to the failure to protect babies. However, this narrow scope has been criticized for presupposing guilt and ignoring serious doubts about the convictions.
Concerns About Wrongful Conviction
Just two months before the inquiry opened, a report by Chris Henley KC into the wrongful conviction of Andrew Malkinson highlighted a deep-seated cultural reluctance within the legal system to acknowledge mistakes. Henley emphasized that the criminal courts produce miscarriages of justice and that entirely innocent defendants are sometimes convicted. This warning resonates strongly with the Letby case, where many distinguished experts have expressed concerns that the system may have made another grave error.
Unanswered Questions and Systemic Issues
The Thirlwall inquiry has yet to address key questions about the evidence used to convict Letby. For instance, the reliability of statistical evidence and expert testimony has been questioned. Moreover, the inquiry's focus on management culture, while important, may distract from the possibility that Letby is innocent.
Comparison of Inquiry Focus vs. Critical Issues
| Inquiry Focus | Critical Unanswered Questions |
|---|---|
| Hospital management and culture | Was Letby's conviction safe? |
| Failure to protect babies | Was there a miscarriage of justice? |
| Staffing and protocols | Did statistical evidence mislead the jury? |
This table illustrates how the inquiry's scope may be misaligned with the most pressing concerns.

Key Takeaways
- The Thirlwall inquiry's terms of reference assume Letby's guilt, limiting its ability to examine alternative explanations.
- Experts have raised serious doubts about the safety of Letby's convictions, citing flawed evidence.
- The legal system's reluctance to admit mistakes, as highlighted by the Malkinson case, may be repeating itself.
- Public confidence in the justice system could be undermined if these questions remain unanswered.
FAQ
What is the Thirlwall inquiry?
What is the Thirlwall inquiry?
The Thirlwall inquiry is a public inquiry set up in 2023 to examine the events at the Countess of Chester Hospital and the management culture surrounding Lucy Letby's convictions.
Why are there concerns about the inquiry?
Why are there concerns about the inquiry?
Concerns arise because the inquiry's terms of reference assume Letby's guilt, potentially overlooking evidence that could prove a miscarriage of justice.
What did the Henley report say?
What did the Henley report say?
The Henley report into Andrew Malkinson's wrongful conviction criticized the legal system's cultural reluctance to acknowledge mistakes and warned that innocent defendants are sometimes convicted.
As the Thirlwall inquiry continues, it must confront these unanswered questions to ensure justice is served and public trust in the legal system is maintained.
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