Early life and education
Lucy Letby was born on 4 January 1990. She grew up in Hereford, England, the only child of John and Susan Letby. She attended Aylestone School and Hereford Sixth Form College before going up to the University of Chester, where she studied for a BSc in Children’s Nursing. She graduated in 2011.
Her clinical-training placements during her degree included a rotation on the neonatal unit at the Countess of Chester Hospital. She joined the Trust as a qualified neonatal nurse in 2012, working on that same unit, where she remained until she was redeployed off front-line clinical duties in June 2016.
Career as a neonatal nurse
Ms Letby was a Band 5 neonatal nurse at the Countess of Chester Hospital for almost the entirety of her clinical career — from 2012 through the events of 2015–2016 and continuing in a non-clinical administrative role thereafter until her arrest in July 2018. Her Nursing and Midwifery Council registration was active throughout that period; she was struck off the NMC register in 2024 following her conviction.
During the 2015–2016 window that subsequently became the focus of the criminal investigation, she worked a mix of day, twilight and night shifts on the neonatal unit, which provided Level 2 (high-dependency) care for premature and unwell infants. The unit escalated babies requiring Level 3 (intensive) care to specialist tertiary centres, principally Liverpool Women’s and Arrowe Park.
The Operation Hummingbird investigation
In May 2017, senior management at the Countess of Chester Hospital referred a cluster of unexpected neonatal deaths and collapses on the unit during 2015–2016 to Cheshire Constabulary. That referral triggered Operation Hummingbird, the criminal investigation that focused, over time, on Ms Letby.
She was first arrested in July 2018, again in June 2019, and a third time in November 2020 when charges were brought. In November 2020 she was charged with eight counts of murder and ten counts of attempted murder; the charge sheet was subsequently revised as some counts were severed for retrial.
Trials and convictions
Her first trial began at Manchester Crown Court in October 2022 before Mr Justice Goss and ran for ten months. On 18 August 2023 she was convicted of the murder of seven infants (Children A, C, D, E, I, O and P) and the attempted murder of six others. The jury was unable to reach verdicts on six further counts of attempted murder, including one count relating to Child K. On 21 August 2023 Mr Justice Goss imposed a whole-life order — the sentencing remarks are available in our transcripts archive.
A retrial on the Child K count took place in June–July 2024. On 2 July 2024, Ms Letby was convicted of the attempted murder of Child K. On 5 July 2024 Mr Justice Goss imposed a further whole-life order to run concurrently. She now serves fifteen whole-life orders in total — she is one of a small number of women in UK criminal history subject to a whole-life term.
The Court of Appeal refused leave to appeal the original convictions on 24 May 2024 (judgment in our transcripts archive). That judgment, however, pre-dates the February 2025 Shoo Lee International Expert Panel report and the body of fresh-evidence material subsequently filed with the CCRC.
Post-conviction proceedings
Ms Letby’s legal team for the post-conviction stage is led by Mark McDonald KC, instructed after the Court of Appeal’s May 2024 refusal. On 3 February 2025 a preliminary application was lodged with the Criminal Cases Review Commission; further material has been added throughout 2025 and into 2026. As of October 2025 the application is supported by 31+ independent expert reports across neonatology, pathology, clinical biochemistry, statistics and related specialisms.
The CCRC review was confirmed publicly as “active” in a statement from chair Dame Vera Baird KC on 13 February 2026. The Commission has not indicated a timeline for a referral decision. The statutory test the Commission is applying is that under section 13 of the Criminal Appeal Act 1995: whether there is a “real possibility” that the Court of Appeal would now quash the convictions on the evidence as it now stands. See our CCRC referral pathway analysis for the procedural detail.
On 20 January 2026 the Crown Prosecution Service announced it would not be proceeding with eleven further charges relating to nine additional babies that had been under investigation, citing that “the evidential test was not met.” The Operation Hummingbird criminal investigation is effectively now in run-off; the live question on its subject-matter sits with the CCRC.
Current status
As of 17 May 2026, Ms Letby is serving her sentence in HMP Bronzefield. Her convictions stand. The CCRC review of those convictions is active and ongoing. Two related but structurally separate processes — the Thirlwall Inquiry (an institutional examination of the Trust) and Operation Duet (a corporate-manslaughter investigation into former senior managers) — continue in parallel. The six-baby inquests have been relisted to 2027.
Read alongside
- The babies — case summaries (Children A–Q)
- Full timeline
- Evidence issues
- Where the evidence now stands
- CCRC referral pathway
- Mark McDonald KC — lead post-conviction counsel
Why this biography is on the site
Until now this site did not carry a dedicated reference page for the subject of the case. That was a gap, given that almost every other named figure connected to the case — trial counsel, expert witnesses, journalists, officials, family members of the infants — has had a profile. This page is a neutral biographical reference, structurally parallel to the others, and is offered to readers who want a single accessible page covering the publicly-reported biographical facts and procedural history of the case.