JBX v Frimley Health NHS Foundation Trust: Lessons for Medico-Legal Experts

Recent High Court litigation has provided a useful reminder of the standards expected from expert witnesses in catastrophic injury claims.

In JBX v Frimley Health NHS Foundation Trust [2026] EWHC 2294 (KB), liability had already been admitted. The court was therefore required to determine the appropriate level of damages, including the claimant’s future accommodation and care needs.

The accommodation dispute

A central issue was whether JBX should receive damages for a bespoke home-based care package or instead live in a specialist residential neuro-rehabilitation setting.

The claimant’s experts supported the proposed home-care arrangement. The Trust’s experts considered residential care safer and better able to respond to unpredictable medical emergencies.

The court ultimately preferred the specialist residential model. In doing so, it emphasised that the legal question was the claimant’s reasonable needs, rather than necessarily the arrangement preferred by the claimant’s family.

The importance of balanced expert evidence

The judgment is particularly relevant to medico-legal experts because the court criticised aspects of the claimant’s expert evidence.

The criticism included insufficient consideration of the disadvantages and risks of home-based care, failure to engage properly with competing professional opinions, limited consideration of alternative residential provision, and evidence which appeared to advocate for one outcome rather than assist the court objectively.

The court preferred evidence that addressed both the benefits and drawbacks of each care model. This reinforces the principle that an expert’s role is not to support the instructing party’s preferred outcome, but to provide independent assistance to the court.

Practical lessons for expert witnesses

• Address alternative options: explain why the recommended option is preferable while examining realistic alternatives.

• Consider risks as well as benefits, including emergency escalation, staffing resilience, carer fatigue, clinical complexity and access to specialist support.

• Engage with opposing evidence by identifying areas of agreement and disagreement and explaining the basis for any different conclusion.

• Avoid advocacy. An expert may give firm conclusions, but the reasoning should remain objective.

• Keep the legal test in view. The clinically preferred arrangement is not always the legally compensable outcome.

Lost-years damages

The judgment also considered the assessment of lost-years damages for a child claimant, following the Supreme Court’s decision in CCC v Sheffield Teaching Hospitals NHS Foundation Trust.

The court rejected an earnings assessment based on the claimant’s father’s career as too speculative and instead relied on average non-manual earnings. It also rejected a proposed 90% deduction for living expenses and applied a 50% deduction.

Although this aspect concerns damages rather than expert conduct, it demonstrates the importance of well-supported assumptions. Evidence about future earnings, employment and expenditure must be based on defensible methodology rather than family background or speculation.

Conclusion

JBX is a useful reminder that expert evidence must be balanced, analytical and independent. Experts should demonstrate that they have considered the full range of reasonable options, including evidence that may weaken their preferred conclusion.

A report that reads as advocacy may be given less weight, even where the expert is highly qualified. Clear reasoning, engagement with opposing evidence and careful attention to the legal question remain essential to effective medico-legal reporting.

This article is for general information only and should not be treated as legal advice. The judgment and citation should be checked against the official court record before publication.