When Advocacy Undermines Objectivity

A paediatric clinical negligence claim failed after the claimant’s expert was found to have adopted an overly partisan stance in court. Although the clinical questions were finely balanced, the judge criticised the expert’s inconsistency, unwillingness to concede fair points, and “combative” manner under questioning, finding that these issues undermined the weight of his evidence. The case reinforces that credibility depends as much on demeanour and neutrality as on clinical expertise.

Case Insight

In Sidney Conway v Yeovil District Hospitals NHS Foundation Trust & Anor [2025], a baby was admitted in early January 2015 with vomiting, weight loss and rapidly rising head circumference. Pyloric stenosis was initially suspected. At Yeovil, the on-call consultant noted macrocephaly and pencilled a possible cranial ultrasound, but the focus remained abdominal. Sidney was transferred to Bristol two days later; abdominal ultrasound there did not confirm pyloric stenosis, his other symptoms had settled and he was discharged the next day with a plan for community review of head size and development. Tragically, the following day his mother assaulted him again, causing catastrophic brain injury.

The claim alleged that reasonable practitioners should have arranged a very prompt cranial ultrasound before, or immediately after discharge and investigation which, if performed, would probably have revealed head trauma and triggered safeguarding steps that would have prevented the second assault. The defendants denied breach and disputed that any such duty could extend to protecting Sidney from an unforeseeable criminal act of a parent.

Mr Justice Turner addressed two key questions. First, scope of duty (Per Meadows v Khan): the paediatric teams owed a duty to take reasonable steps to diagnose and manage Sidney’s medical condition; they did not owe a general duty to guard him from all risks following discharge, particularly risks they neither knew nor ought reasonably to have suspected. On that basis, the claim failed at the “scope” hurdle: even if “but for” discharge an assault opportunity arose, that is not the kind of risk the clinicians’ duty encompassed.

Second, breach (Bolam/Bolitho): taking the case at its highest for the claimant, the court still found no breach of duty. The claimant’s expert paediatrician, Dr Conway, was described as knowledgeable and well-intentioned but ultimately inconsistent. His position changed significantly over the course of proceedings, for example, abandoning earlier criticism that a head scan was required on 6–7 January, with concessions not driven by new evidence or overlooked arguments. The judge considered that these shifts weakened confidence in his remaining criticisms.

The defence expert, Dr Rose, was preferred. His reasoning was logical, consistent, and aligned with accepted clinical practice, particularly given that, by discharge, all signs suggestive of raised intracranial pressure had resolved (save for head circumference) and the fontanelle was normal.

Crucially for experts, the court also commented on demeanour and approach in the witness box. Dr Conway at times appeared combative, did not always answer questions directly, and seemed to “fight his corner” instead of maintaining a dispassionate, court-facing stance. Dr Rose did not succumb to that temptation. The message is clear: even finely balanced clinical issues can be decided by the perceived fairness, balance, and consistency of the expert, not just by the technical content of the opinion.

Why This Matters

This judgment is a fresh reminder that expert evidence is judged on method and manner. Courts expect:

• Transparent reasoning that distinguishes facts from assumptions.
• Consistency unless a change is clearly justified and documented.
• Calm, neutral engagement with contrary views.

Advocacy, even subtle, erodes weight. Measured professionalism builds it.

Key Lessons for Medico-Legal Experts

01 Avoid advocacy, however well-intentioned.
It’s natural to want to support the instructing party, but once in the witness box, your audience is the Court. Neutrality is your strength. A calm, reasoned explanation carries far more influence than a combative defence.

02 Concessions strengthen not weaken credibility.
Admitting when an alternative view has merit demonstrates fairness and confidence. Reasonable concessions show that your opinion is grounded in analysis, not allegiance.

03 Focus only on the question asked.
Many experts lose ground by expanding answers to address the question they wish had been asked. Precision signals control. Listen carefully, respond directly, and avoid speculation beyond your evidence base.

04 Manage tone under pressure.
The way you handle challenge is as telling as your content. Respectful, measured responses reinforce authority; irritation or defensiveness undermines it.

05 Stay dispassionate in difficult cases.
Especially where the facts involve children or emotional subject matter, objectivity can feel unnatural but is essential. Keep the focus on method, data, and reasoning, not emotion or outcome.

Putting It Into Practice

• Rehearse neutrality. Before court, practise explaining your opinion alongside plausible opposing views. Aim to sound balanced, not combative.
• Use written statements to show balance. Acknowledge uncertainties and areas where reasonable experts might differ. This strengthens, not softens, your report.
• Keep an “audit trail of fairness.” If you reject another expert’s reasoning, record precisely why, with evidence, not rhetoric.
• Reflect after every appearance. Note any moments where questioning felt uncomfortable or defensive. Use that feedback to refine your future delivery.