Prof Peter HindmarshClinician

Biography

Professor Peter Hindmarsh was Professor of Paediatric Endocrinology at University College London and Consultant in Paediatric Endocrinology and Diabetes at University College London Hospitals (UCLH) and Great Ormond Street Hospital (GOSH), also serving as Divisional Clinical Director for Paediatrics at UCLH. His clinical and research work centred on adrenal disorders, diabetes management using pump technology, and cortisol physiology as it relates to replacement therapies for adrenal insufficiency. He published extensively on hydrocortisone pharmacology and pioneered the use of pump delivery of hydrocortisone to mimic the circadian rhythm of cortisol in conditions such as congenital adrenal hyperplasia. In December 2017 he was named Britain's most inspiring health worker by the Daily Mail Health Heroes award for his work in paediatric endocrinology and diabetes. He relinquished his GMC registration on 14 November 2024, ending a fitness-to-practise investigation without any regulatory finding, following scrutiny of his role as a prosecution expert witness in the Lucy Letby trial.

References

1. 1.Peter Hindmarsh | International and Private Care – GOSH — Establishes his professorship at UCL, consultant roles at UCLH and GOSH, and his position as Divisional Clinical Director for Paediatrics at UCLH; clinical specialisms in adrenal disorders and diabetes using pump technology.
2. 2.UCL professor named Britain's most inspiring health worker | UCL News — Confirms his affiliation with UCL Great Ormond Street Institute of Child Health and his recognition as Britain's most inspiring health worker in 2017 for paediatric endocrinology and diabetes work.
3. 3.Congenital Adrenal Hyperplasia: A Comprehensive Guide – Amazon — Confirms his publication record on cortisol physiology, pharmacology and replacement therapies for adrenal insufficiency, and his interest in physiological delivery of hydrocortisone using pump therapy.
4. 4.Lucy Letby case expert witness was under fitness to practise investigation during trial – Patient Safety Learning — Documents the GMC fitness-to-practise investigation opened against Hindmarsh, the restrictions placed on his work, and that GOSH reported him following a formal investigation led by UCLH.

Expertise

Cited on

• Hospital discharge / bed-blocking
• NHS & care workforce/staffing

Stated areas of expertise

• Paediatric endocrinology
• Adrenal disorders and congenital adrenal hyperplasia
• Diabetes and intensive insulin therapies
• Hydrocortisone replacement and pump therapy
• Paediatric diabetes service delivery
• Expert witness testimony (clinical)

Notable achievements

• Named Britain's most inspiring health worker at the Daily Mail Health Heroes awards 2017, for his work in paediatric endocrinology and diabetes. Source ↗
• Co-authored 'Congenital Adrenal Hyperplasia: A Comprehensive Guide' (Elsevier/Academic Press), published on cortisol physiology, pharmacology and replacement therapies for adrenal insufficiency. Source ↗
• Co-authored British Society for Paediatric Endocrinology and Diabetes consensus guidance on emergency and perioperative management of adrenal insufficiency in children and young people. Source ↗

What they’ve said

• “He first gave evidence on 25 November 2022. He was an expert witness for the prosecution's case that Letby attempted to murder two babies, referred to as F and L. Hindmarsh's evidence supported the case that both babies had been poisoned with insulin injected into their fluid feed bags.”

  Professor and consultant paediatric endocrinologist · Hospital discharge / bed-blocking · 27 Aug 2026 · Lucy Letby case expert witness was under fitness-to-practise investigation during trial ↗

• “Hindmarsh provided crucial evidence in the trial for the prosecution's case that Letby had attempted to murder two babies, referred to as F and L, by injecting insulin into their fluid bags.”

  consultant paediatric endocrinologist and clinical director for paediatrics at University College London hospital · NHS & care workforce/staffing · 27 Aug 2026 · Expert witness in Lucy Letby trial did not reveal hospital investigation into his medical work ↗

Source references

1. Lucy Letby case expert witness was under fitness-to-practise investigation during trialtheguardian.com · 27 Aug 2026
2. Expert witness in Lucy Letby trial did not reveal hospital investigation into his medical worktheguardian.com · 27 Aug 2026

Contact & links

• Staff pagehttps://profiles.ucl.ac.uk/6324-peter-hindmarsh
• Staff pagehttps://www.gosh.com.kw/consultants/peter-hindmarsh
• Press office phone+44 (0)20 3447 9897published here ↗

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