Working with expert witnesses... is a new monthly article series. The series takes a look at the role of expert witnesses in a range of sectors from the perspective of the legal and other professionals who work with them. If you are interested in being featured in the series, you can contact us at policy@ewi.org.uk. 

In the second article in the series, Thomas Hamilton, a Senior Solicitor at Thompsons Solicitors, discusses his experience of working with expert witnesses in serious injury claims. 

The Civil Justice Council (‘CJC’) has published an Interim Report and Consultation on the Use of AI for preparing court documents. The focus of the consultation paper is whether court rules are required to regulate the use of AI by legal representatives. However, the consultation also examines whether the use of AI by experts should be subject to court rules, with specific proposals set out in Part 8 of the consultation document.

The claimant alleged that the second defendant, a Spanish racing driver, had repudiated a binding agreement under which he was contracted to drive for the claimants’ IndyCar team for the 2024, 2025 and 2026 racing seasons. The judge found some of the expert witnesses to be impressive and independent, while the expert evidence of others was unimpressive and disappointing.  

The defendant was contracted, during the Covid lockdowns, to source and supply sterile gowns, which the claimant subsequently asserted were not contractually compliant. Issues for expert evidence included the sterility of the gowns and whether the claimant could have mitigated the loss by resale.

The Claimants brought an action against the Defendant, the Secretary of State for Education, for negligence and misfeasance in public office, relating to the actions of the Skills Funding Agency (‘SFA’), for which the Defendant is responsible. The Claimants alleged that the acts of SFA prevented them from selling their business for around £27 million, plus a lost chance of converting around £10 million in rollover loan notes.

The Defendant issued an application to revoke the Claimants’ permission to rely upon their forensic accounting expert evidence, because it had become clear that one of the Claimants, who was a trained accountant, had had significant secret involvement in the preparation of the expert’s report and the Joint Statement.

The Claimant alleged that an accident five years earlier was the cause of the amputation of his lower leg. The judge criticised the Claimant’s orthopaedic expert, Professor H, for demonstrating at times a rather ‘loose approach’ to his expert evidence and a closed mindedness towards his evidence.

There are some general learning points for all experts but otherwise this is for neurosurgeons. It is another road traffic accident personal injury case in which the court needed the assistance of neurosurgeons, or at least it would have done but for the fact that it made a finding which made it unnecessary to consider the neurosurgical evidence before reaching a judgment. The nature of the injuries sustained by the claimant were not in dispute. What was in dispute, but ultimately irrelevant, was what the child’s injuries would have been if the driver of the vehicle had been driving (non-negligently) at a lower speed than he was. It was on this point that the neurosurgical experts disagreed.

MW v Wilkinson [2025] EWHC 2300 (KB) 

This is an important judgment for obstetricians as it shows in precise detail how the court, relying on not just the experts’ evidence but a critical analysis of the literature on which they relied, decided whether the claimant would have avoided developing HELLP had she been advised to take 75 mg aspirin at 12 (or 14) weeks instead of at 23. Twelve publications were put under the microscope and considered also in the light of research concerning the relative value of aggregate data and individual participant data.

Although the issue in this case was the prevention of HELLP, it may be an important judgment to consider in pre-eclampsia cases.

De Francisci v Hampshire Hospitals NHS Foundation Trust (County Court, Basingstoke sitting at Southampton, 9 May 2024) Case No: F16YM828

The claimant asserted that the defendant was required to transfer title in a vessel at the expiry of the bareboat counterparty between them. The judge noted that the claimant’s witness on insurance broking had essentially no experience in the matter for expert evidence and his views appeared to be based on conversations with unidentified others, rather than his own experience of testable research.

The claimant alleged that the vibrating tools he used while employed by the defendant caused Hand-Arm Vibration Syndrome. The judge criticised one of the medical experts for looking for answers that supported his strong views on the subject, rather than obtaining a reliable history from the claimant.