May 2026: Thirlwall Inquiry report delayed to at least September 2026 · six-baby inquests relisted to 2027 · CCRC review active · Shoo Lee Panel: no medical evidence of deliberate harm.
Sudden deteriorations in the indicted infants were framed as anomalous and as requiring a deliberate-act explanation.
Group B Streptococcus (GBS) is colonised in 10-30% of pregnant women in the UK. Late-onset GBS sepsis (>72 hours of life) is the leading cause of unexpected collapse and mortality in preterm neonates beyond the early-onset window. Presentation is characteristically sudden — apnoea, bradycardia, circulatory collapse — and frequently mimics the deterioration trajectory the prosecution attributed to deliberate harm. Without paired blood-culture and PCR investigation taken at the moment of collapse (which is methodologically difficult mid-resuscitation), late-onset GBS sepsis is routinely missed and attributed to other causes after the fact. Independent paediatric review has flagged the GBS differential across multiple Letby counts.
Sudden apnoea and circulatory collapse in a preterm neonate beyond 72 hours of life is most commonly late-onset sepsis until proven otherwise. Group B Strep is the leading single organism. Reaching past it for a deliberate-act explanation requires positive evidence — not merely the absence of a confirmatory blood culture.
Infection differentials were referenced selectively. The leading-cause status of late-onset GBS sepsis in unexpected preterm collapse — and the methodological difficulty of catching it on culture mid-resuscitation — was not foregrounded.
The Panel's case-by-case findings consistently weight infection-related natural-cause mechanisms in assessing whether a deterioration requires a deliberate-act explanation.