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July 2026: Government declines to widen the Thirlwall terms of reference (16 July) · new 100-page insulin report to the CCRC challenging the trial evidence (9 July) · Thirlwall report still expected no earlier than September · inquests relisted to 2027 · Shoo Lee Panel: no medical evidence of deliberate harm.

Lucy Letby Facts

Conflict-map · Post-conviction statistical experts

Prof. Stephen Senn

Statistician and methodologist (Edinburgh)

StatisticsStatistical analysis2Expert/professional

Main contribution

Senn, formerly head of health statistics at the University of Glasgow, was one of 24 signatories to a private letter sent to the health and justice secretaries in July 2024, seen by the Guardian, calling for the Thirlwall Inquiry into the Countess of Chester deaths to be postponed or have its terms of reference changed. The signatories, mostly doctors, nurses and scientists, said they were not associated with Letby or her defence.

Key claim

The letter argued the inquiry's narrow terms of reference risked a 'failure in understanding and examining alternative, potentially complex causes for the deaths', so that 'possible negligent deaths that were presumed to be murders' could be missed, and asked for a pause 'to allow for further investigation and to hear wider professional concerns' rather than proceeding on an assumption of guilt.

Sources

Conflict-map topics this expert participates in

Full biographical profile

Prof. Stephen Senn — biography

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Post-conviction statistical experts.