In the last podcast for 2024, we look back at the ten key issues for expert witnesses that we've seen over the course of 2024, and highlight the ten things to look out for in 2025. From knowing and complying with your duties, to reevaluating and changing you opinion and handling fundamental dishonesty, this year in review has it all. 

The judge found that the evidence of the claimants' psychological expert fell well below the standard to be expected of a competent expert witness, both as to form and as to substance.

Rashpal Samrai & Ors v Rajinder Kalia [2024] EWHC 3143 (KB)

In this Bermudan case, the appellant successfully appealed to the Judicial Committee of the Privy Council to have his convictions quashed because of errors in the collection, examination and interpretation of the DNA expert evidence used in the trial.

Julian Washington (Appellant) v The King (Respondent) (Bermuda) [2024] UKPC 34

At a time when psychologists in particular are concerned about psychological evidence being given by psychologists who are unregulated, this case illustrates the risks when an ‘independent’ social worker gives psychological evidence.

The learning points are of general application. The specifics of the case are for psychologists, psychiatrists and social workers.

Coventry City Council v XX [2024] EWFC 249 (B) 

The father sought permission to rely on fresh evidence that he had a diagnosis of autism spectrum disorder in an appeal against care and placement orders made in respect of his daughter. The judge reviewed the law on admitting fresh evidence on appeal before applying it to the case.

The judge noted that the expert readily accepted that integral to his reasoning was that he did not believe the claimant as to the symptoms he had suffered and, probably, teh claimant's account of the incident. In the judge's view, it is entirely outside the remit of an expert to decide which witnesses of fact he believes or disbelieves.

Allard v Govia Thameslink Railway Ltd [2024] EWHC 2227 (KB) 

The court found that a highly respected and hugely experienced histopathologist expert witness, who was overburdened with work, had made errors in his examination of the forensic material and closed his mind to possible or probable accidental causes for the injuries identified. 

London Borough of Hammersmith and Fulham v G [2024] EWHC 2200 (Fam) 

The judge in this patent case found that the claimants’ gene therapy expert had developed, quite possibly guided by lawyers, the understanding that the primary duty of an expert witness is not to say anything that may damage the instructing party’s case if it can be avoided.

In this US case, an expert in fiduciary services used Microsoft’s Copilot to cross-check calculations he used in expert evidence. He was unable to recall the prompts he used, state the sources Copilot relied on, or explain how the tool worked and arrived at its outputs. The judge provided some useful insight into the challenges with using AI in expert evidence. 

The defendant’s spinal cord injury expert in this case agreed early on in his cross-examination that he had lost all objectivity and independence in the case, while the defendant’s physiotherapy and accommodation experts were criticised by the judge for adopting more partisan approaches in their later evidence.