Expert evidence decides personal injury cases, and it rarely fails on the science. It fails on permission, on proportionality, on an assumption that was never a finding of fact, or on a concession the expert makes ten minutes into cross-examination. Nicky Carter works through where that happens and how to stop it.
The session starts with the Part 35 machinery: the burden on the party seeking to rely, the reasonably required test, and why no expert can be called without permission. It then covers the practical rules you actually reach for, including written questions under 35.6 and whether asking them tips off your opponent, the court's power to impose a single joint expert under 35.7, and what Daniels v Walker allows a dissatisfied party to do next.
From there it moves to the risk areas. Amending a report versus changing the expert, and the condition the court can impose requiring disclosure of the earlier unrelied-upon report. Where the line falls between a witness of fact giving opinion and an expert. Why accident reconstruction evidence keeps being over-read, with a run of decisions warning against precise findings on distance. And how surveillance footage, symptom validity testing and expert concessions now combine in fundamental dishonesty arguments.
Key Takeaways
- What reasonably required actually means on an application for permission, and why a few thousand pounds of additional damages will not carry a disproportionate expert
- How to use written questions under rule 35.6 without handing your opponent the weakness you had been saving for cross-examination
- Why a single joint expert report is the starting point rather than the end point, and the low bar in Daniels v Walker for getting your own expert
- Why amending a report is almost always safer than changing the expert, and how disclosure of the earlier report can be made a condition of permission
- Why experts' factual assumptions never become findings of fact, and the repeated warnings against precise reconstruction findings on distance and speed
- How surveillance evidence is treated even when the process was flawed, and what happens when experts revisit their opinion after seeing the footage