The court noted that the jointly instructed expert demonstrated a clear lack of understanding of both CPR 35 and the duties owed to the court by an expert in allowing someone else in this firm to answer CPR 35 questions on his behalf. His report was also entirely equivocal on the key issues and therefore offered little or no assistance to the court.

Kate Rodgers v Laural Brookes [2025] EWCC 31

Within this update we feature the well-publicised case of WH Holding Limited and E20 Stadium LLP [2025] EWHC 140 (Comm).  The case concerns a successful challenge of an expert’s decision in the context of a concession agreement for sporting events. 

The claim was initiated as a High Court claim for declaratory relief under Part 8 of the Civil Procedure Rules.  The judgment was released in January of this year having been heard by Paul Mitchell KC last December. 

The claimant alleged both negligence and breach of contract by the defendant designer of a container park near Felixstowe Port. The judge set out the reasons why she was not impressed by the claimant’s expert and treated his evidence with significant caution.

MJS Projects (March) Limited v RPS Consulting Services Limited [2025] EWHC 831 (TCC)

The claimant brought a clinical negligence claim against two general practitioners alleging that they failed to act on a potential diagnosis of pelvic inflammatory disease. The judge found that one of the GP experts had trespassed on the judicial function to determine the facts and had sought to advocate on behalf of the second defendant.

The claimants, who carried on a business breeding falcons, made allegations of harassment and nuisance against their neighbour, who operated a small farm neighbouring their property. While the judge accepted some of the claimants’ criticisms of one of the defendants’ experts, he also noted that the claimants could not complain about the consequences of their putting in new evidence that was not in accordance with the timetable laid down at the CCMC.

This was a significant and well reported patent case which was determined in the Intellectual Property List within the High Court last autumn.   

The technical aspects of the case required significant expert input from the panel involved.  The cross-examinations performed by leading Counsel for the parties were lengthy and complicated.  This led to confusion over what evidence was given when the transcripts were re-visited on subsequent trial days. The case shows how consideration should be given to experts who are being cross-examined so not to overload them with questions and information on the stand.

The expert paediatrician in this case misidentified and confused twins when reading the primary medical disclose. This fundamental error was of seminal importance in this case because the twins had very different birth and post-birth experiences, with one being much weaker and more vulnerable than the other.  The judge noted that the cross-examination of the expert was nothing short of a demolition of the expert’s evidence.

LB Croydon v D (critical scrutiny of the paedeatric overview)

The complexities of this case required both parties to engage expert quantity surveyors.  Both sides approached their instructions to their expert from different angles which caused difficulties at trial.  This explained why the valuations were worlds apart (or as the judge commented they had a “manifestly excessive difference”) and needed some careful scrutiny and assessment by the judge. Whilst the approach of examining both valuations is very case specific, there are some fundamental tests which can be taken away.  An objective test was used several times as a benchmark looking at the scope of works that a ‘reasonable owner’ or ‘purchaser’ would require.  The key legal issue of “proportionality” was also visited frequently throughout the assessment of valuations. 

Iya Patarkatsishvili & Anor v William Woodward-Fisher [2025] EWHC 265 (Ch)

The judge in this claim for professional negligence struck out a witness statement which contained paragraphs which were pure opinion, made by the witness as a self-proclaimed expert, noting that it was expert evidence by the back door, in contravention of CPR Part 35 and plainly abusive. 

Israel Russell v Barry Coulter [2025] EWHC 493 (KB)

While the Judge in this extradition appeal ultimately reached the same conclusion as the District Court Judge, and dismissed the appeal, he pointed out significant deficiencies in how the District Court Judge had treated the expert psychological evidence.