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July 2026: Government declines to widen the Thirlwall terms of reference (16 July) · new 100-page insulin report to the CCRC challenging the trial evidence (9 July) · Thirlwall report still expected no earlier than September · inquests relisted to 2027 · Shoo Lee Panel: no medical evidence of deliberate harm.

Lucy Letby Facts

Biography · External reviewer

Dr Nim Subhedar

Consultant neonatologist at Liverpool Women’s Hospital, appointed as external reviewer to the Thirlwall Inquiry. Gave evidence on the structural constraints that limit what clinical-record review can establish about the cause of a neonatal mortality cluster.

External reviewer
Thirlwall witness
Neonatologist
Last updated
5 min read

Background and appointment

Dr Nim Subhedar is a consultant neonatologist based at Liverpool Women’s Hospital, one of the largest neonatal units in England and a regional tertiary centre for high-dependency and intensive-care neonatal cases. His clinical practice spans the full range of neonatal medicine, and his institutional setting gives him a working reference point for the scale and staffing conditions of a major NHS neonatal unit — a directly relevant comparator to the Countess of Chester Hospital’s Level 2 unit during the indictment period.

Lady Justice Thirlwall’s Inquiry appointed Dr Subhedar as an external reviewer to provide independent neonatal-expert assessment. External reviewers occupy a distinct function in the Inquiry architecture: they are not witnesses to events at the Countess of Chester, but expert assessors brought in to contextualise clinical evidence and evaluate the adequacy of previous review processes.

Evidence on review constraints

Dr Subhedar’s Thirlwall evidence addressed a question that sits at the heart of the institutional-failure story: why did the clinical reviews conducted in 2015 and 2016 fail to arrive at a deliberate-harm finding, and what are the inherent limits of the review methodology that was used? RCPCH-style external reviews are designed to assess the adequacy of clinical care and to identify systemic service-quality problems. They are not criminal investigations. The reviewers work from clinical records, mortality-and-morbidity documentation, and structured interviews. They do not have powers of compulsion, access to communications data, or forensic-science support.

Dr Subhedar’s evidence identified the gap between what a review of that type can reasonably establish and what a deliberate-harm hypothesis requires. Reaching a conclusion that a specific individual caused harm through deliberate action demands a standard of evidence and an investigative toolkit that sits outside the scope of a service review. The practical consequence was that the RCPCH review process — however competently conducted — was structurally unsuited to detecting the kind of harm that was later alleged.

Implications for the Thirlwall findings

The Inquiry’s terms of reference required it to examine whether the Trust’s response — choosing an RCPCH service review over a police referral — was appropriate given what the executive team knew at each decision point. Dr Subhedar’s expert framing helped the Inquiry assess whether a clinician in possession of the information available in 2016 could or should have identified the situation as requiring law-enforcement involvement rather than clinical-governance escalation. His evidence is therefore relevant not just to understanding the review process itself but to evaluating the culpability of the executives who designed and commissioned it.

Relevance to the wider evidence architecture

The constraints Dr Subhedar identified apply symmetrically in one important respect: if clinical-record review alone cannot reliably establish deliberate harm, the question of whether such review can reliably exclude natural or iatrogenic explanations is equally live. This is relevant to the evidence base that was ultimately presented at trial, and to the academic and legal critiques that have focused on the inferential weight placed on statistical presence patterns and clinical-mechanism hypotheses developed from record review by witnesses including Dr Dewi Evans. The structural limitation Dr Subhedar identified as a constraint on the 2016 review is the same limitation that critics of the prosecution’s expert evidence have raised about the trial itself.

Read alongside

Source

Thirlwall Inquiry evidence bundles and published transcripts; Liverpool Women’s Hospital NHS Foundation Trust public records.