Role in the case
As Director of Nursing, Kelly held the executive nursing-line responsibility for the neonatal unit during the 2015-2016 cluster. Thirlwall Inquiry evidence documents the decisions to reassign Ms Letby away from clinical duties in June 2016 (to a non-patient-facing role in the risk and patient-safety office), to commission the RCPCH service review rather than forensic investigation, and the subsequent sequence through to May 2017 when police were contacted.
The July 2025 arrest
On 1 July 2025 Kelly was arrested alongside Chambers and Harvey on suspicion of gross negligence manslaughter. The investigation relates to the executive-team clinical-governance decision chain, not directly to the deaths for which Ms Letby was convicted. The CPS has not yet made a charging decision.
The nursing-leadership chain and the consultant-escalation response
As Director of Nursing, Kelly was the executive through whom the nursing-line concerns about the neonatal unit were filtered and to whom ward-level management — including Eirian Powell as Ward Manager — was ultimately accountable. The consultant body’s concerns about Letby were escalated through the medical line to the Medical Director Ian Harvey, but the nursing line was also directly relevant: Letby was a nurse, and the management of her conduct, reassignment, and return to clinical duties was substantially a nursing-governance matter. Kelly’s executive position meant she was a party to the key decisions at the intersection of clinical-governance and nursing-management: the June 2016 reassignment, the structure of the RCPCH review brief, and the question of whether Letby should be returned to patient-facing work.
The Thirlwall Inquiry’s examination of the nursing-leadership chain addresses how information about the cluster was shared within the nursing management structure, whether nursing-floor observations were adequately escalated by Ward Manager Powell to Kelly’s level, and whether Kelly’s responses to the escalating clinical concerns were adequate. The doctor-nurse power-dynamics analysis addresses the structural context within which Kelly’s role operated.
The RCPCH review and the police-referral decision
The decision in autumn 2016 to commission an RCPCH service review rather than refer the matter to police was taken collectively by the executive team: Chambers, Harvey, and Kelly are the three individuals whose decision-making is most directly examined at Thirlwall on this point. Kelly’s nursing-executive perspective on that decision is evidentially significant because the RCPCH review was framed as a service-quality exercise rather than an investigation of individual conduct, and the nursing-service dimension of that framing — staffing levels, training, the unit’s tier designation — was within her executive remit. The RCPCH review as decoy analysis examines the gap between the review’s brief and the clinical concern it was intended to address.
Post-COCH career and the 2025 arrest
Following the Letby conviction in August 2023, Kelly’s subsequent role at the Northern Care Alliance NHS Foundation Trust became a matter of public scrutiny: questions were raised about whether her departure from COCH and appointment in a new senior NHS nursing-executive role had been accompanied by adequate disclosure of her role in the institutional failures at Chester. She was suspended from that role following the trial coverage. The July 2025 arrest on suspicion of gross negligence manslaughter represents the current stage of the criminal investigation into the executive decision chain; the CPS charging decision will be the next consequential step. The timeline of the arrest is documented at July 2025: executives arrested.
Read alongside
- Tony Chambers — former CEO
- Ian Harvey — former Medical Director
- Sir Duncan Nichol — former Trust Board Chair
- Analysis: apology-letter sequence
- Analysis: RCPCH review as decoy
- Timeline: executives arrested July 2025
Source
Thirlwall Inquiry evidence bundles; Cheshire Police statements 1 July 2025; CPS public communications.