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.
The prosecution treated the 17 indicted infants as, in substance, a homogeneous cohort for purposes of the shift-rota chart and the mortality pattern. The fact that a disproportionately high number of them were from twin or multiple-birth pregnancies was not foregrounded as relevant to clinical explanation.
Independent analysis published on lucyletby.org documents that at least 11 of the 17 indicted babies were twins or multiples, and that 4 co-twins (not in the indictment) had already died in utero. That makes the cohort overwhelmingly a twin/multiple cohort rather than a general neonatal-unit cohort. Twin and multiple pregnancies carry substantially higher perinatal mortality, particularly at the edge of viability; where monochorionic complications such as twin-to-twin transfusion syndrome (TTTS) are in play, natural mortality climbs further. The specific clinical histories — antiphospholipid syndrome, TTTS requiring fetal surgery, ruptured placentas, co-twins previously ectopic — establish that the indicted cohort was preselected for high risk before Ms Letby saw any of them.
When 11 of 17 indicted babies are twins or multiples, and 4 more co-twins died before birth, the cohort is not typical of the unit. It is typical of twin pregnancies referred for specialist care — where mortality is, by reference to the national literature, expected to be substantially elevated.
The jury heard individual case histories but were not walked through the cohort as a twin/multiples cohort. The shift chart implied the pattern of presence was unusual against a general-neonatal-unit baseline.
The Panel's case-by-case reviews include specific twin-pregnancy context where relevant (Child J's TTTS, Child Q's co-twin surgery, Children A & B's APS-complicated pregnancy). The Panel concludes these clinical contexts, taken case by case, explain the deteriorations without deliberate harm.