Interview With Prof. David Livermore On Lucy Letby

Professor David Livermore, a medical microbiologist, examines the role of environmental and infectious factors in the deaths on the Countess of Chester neonatal unit. He describes a documented Pseudomonas aeruginosa problem in the hospital's water system during the relevant period, a known risk factor for neonatal deaths, and argues this was never adequately investigated or disclosed to the jury. He also discusses the sewage and nappy pad contamination issues on the unit and criticises the Care Quality Commission's 2016 inspection for failing to identify these hazards. He raises specific concerns about the insulin testing: the samples were processed at the Royal Liverpool laboratory using a protocol that he argues did not meet forensic standards, and the laboratory failed its own quality control checks during the relevant period. He also notes the presence of Stenotrophomonas in Baby I, a pathogen consistent with environmental contamination rather than deliberate harm.

Last updated 2026-07-14

2 min read

Notable extracts

Short verbatim extracts from the video. Each quote is under 80 words and attributed to the speaker. Extracted under fair-dealing for review and news reporting (CDPA 1988 s.30).

Prof. David Livermore

There was a documented Pseudomonas problem in the water supply at Countess of Chester. Pseudomonas kills premature babies. This was not investigated as a cause of the deaths. It should have been.

On the Pseudomonas aeruginosa contamination in the hospital water system

Prof. David Livermore

The Royal Liverpool laboratory was failing its quality control checks. That is not a minor technical point. It means you cannot trust the numbers they reported. And those numbers put a woman in prison for life.

On the Liverpool laboratory's quality control failures

Prof. David Livermore

Stenotrophomonas in Baby I is a marker of environmental contamination. It tells you something about the conditions on that unit. It does not tell you about a nurse with a syringe.

On the microbiological findings in Baby I

Interview With Prof. David Livermore On Lucy Letby

Last updated 2026-07-14

2 min read

Notable extracts

Short verbatim extracts from the video. Each quote is under 80 words and attributed to the speaker. Extracted under fair-dealing for review and news reporting (CDPA 1988 s.30).

Prof. David Livermore

There was a documented Pseudomonas problem in the water supply at Countess of Chester. Pseudomonas kills premature babies. This was not investigated as a cause of the deaths. It should have been.

On the Pseudomonas aeruginosa contamination in the hospital water system

Prof. David Livermore

The Royal Liverpool laboratory was failing its quality control checks. That is not a minor technical point. It means you cannot trust the numbers they reported. And those numbers put a woman in prison for life.

On the Liverpool laboratory's quality control failures

Prof. David Livermore

Stenotrophomonas in Baby I is a marker of environmental contamination. It tells you something about the conditions on that unit. It does not tell you about a nurse with a syringe.

On the microbiological findings in Baby I

Interview With Prof. David Livermore On Lucy Letby

Notable extracts

Related on this site

Interview With Prof. David Livermore On Lucy Letby

Notable extracts

Related on this site