In financial services litigation, the expert witness report is frequently the document on which a case turns. A technically correct, well-structured report built on the right legal and regulatory framework will withstand cross-examination and carry weight with the court or tribunal. A report that applies the wrong methodology, misstates the applicable standard, or produces a quantum calculation that cannot be traced back to established precedent will be dismantled by the opposing party's expert — and may do more damage to the instructing party's case than no report at all.
The Rivermead Partnership has been providing financial expert witness services to law firms for over 37 years. In that time we have worked on every significant category of financial services mis-selling and misconduct that has come before the UK courts — from the early mortgage endowment mis-selling cases through PPI, SIPP mis-selling, energy broker commission, motor finance and irresponsible lending. That depth of experience shapes everything about how we approach an instruction.
Experience That Spans the Full History of Financial Services Litigation
Thirty-seven years in financial services expert witness work means we have seen the full arc of mis-selling litigation in this jurisdiction. We have worked on cases that defined the methodology now used across entire claim categories. We have seen approaches that worked and approaches that failed — and we understand why. When a new claim type emerges, we are not starting from first principles. We bring a depth of institutional knowledge about how UK courts and tribunals approach financial services disputes that cannot be replicated by generalist expert witnesses or by practitioners whose experience is limited to a single claim type.
That experience encompasses the full range of financial products and claim categories: consumer credit, mortgage advice, pension transfers and SIPP mis-selling, investment advice, structured products, energy broker commission, discretionary fund management and portfolio management disputes. We have produced reports at every level — County Court, High Court, Court of Appeal, FOS, FCA enforcement proceedings and arbitration. The breadth of that experience directly informs the quality and robustness of every report we produce.
Quantum Calculations Built from Court Precedent
The single most important differentiator in financial services expert witness work is the ability to build quantum calculations directly from established court precedent. This is not a theoretical point — it is the difference between a calculation that will be accepted by the court and one that will be challenged.
Every significant category of financial services mis-selling has a body of case law that defines the correct approach to quantifying loss. Plevin v Paragon establishes the threshold and the excess methodology for PPI commission claims. Wood v Commercial First Business defines the restitutionary approach for undisclosed commission cases. Hopcraft v Close Brothers sets the framework for motor finance redress. The SIPP mis-selling cases establish the comparator portfolio methodology. Kerrigan v Elevate defines the capital-only remedy for irresponsible lending.
A quantum calculation that cannot be traced back to the applicable precedent — that applies a methodology the expert has devised independently, or that uses an approach drawn from a different claim category — is vulnerable from the moment it is served. Opposing counsel will identify the departure from established authority. The expert will be required to justify it under cross-examination. In most cases, a calculation built on the correct precedent-derived methodology is not only more defensible — it produces a more accurate result.
Rivermead's approach is to identify the applicable precedent for each claim category, build the quantum calculation methodology directly from that precedent, and document the derivation clearly in the report so that the connection between the legal authority and the financial calculation is transparent and traceable. This is not a formulaic exercise — every case has features that require judgment in the application of the precedent — but it ensures that the foundation of the calculation is beyond challenge.
We Work for Both Claimants and Defendants
A financial expert witness whose practice is exclusively claimant-side is, by definition, only ever presenting one perspective. Rivermead works for both claimants and defendants — and that dual practice is not a compromise; it is a strength.
Acting for defendants requires precisely the same rigour as acting for claimants. Where a claim has merit, a defendant-instructed expert must say so clearly — an expert who simply argues the defendant's position regardless of the facts is not serving their client well and will be exposed under cross-examination. Where a claim does not have merit, the expert's role is to identify precisely why — the specific evidential, legal or methodological weaknesses that mean the claim cannot succeed.
We have advised defendants in cases where the claim, on examination, was without merit — where the claimant's financial position at the point of lending would have passed a proper affordability assessment, where the commission disclosed was sufficient to meet the applicable standard, where the investment advice was suitable for the client's actual profile, or where the quantum calculation put forward by the claimant's expert was methodologically unsound. In each of those cases our role was to provide an honest, rigorous analysis that protected the defendant from a spurious claim — identifying the precise weaknesses in the claim and presenting them in a form that could be deployed effectively in the defence. That is as valuable a service as building a claimant's case, and it requires the same quality of analysis.
The experience of working across both sides of financial services disputes means we understand exactly how opposing experts think, what arguments they will advance, and where the weaknesses in a claim or a defence are most likely to lie. That understanding makes every report we produce — whether for claimant or defendant — more robust.
What We Provide
Rivermead provides expert witness reports across the full range of financial services mis-selling and misconduct categories. Our instructions cover PPI Plevin commission claims, motor finance commission claims, energy broker undisclosed commission claims, irresponsible lending, SIPP mis-selling, investment advice suitability, discretionary portfolio management disputes and mortgage advice claims. In each category we provide both the liability analysis — applying the relevant regulatory and legal standard to the facts — and the quantum calculation, derived from the applicable court precedent.
We produce reports suitable for pre-action correspondence, FOS complaints, mediation, arbitration and court proceedings at all levels. We are available to attend conferences with counsel, respond to questions on our reports, and give oral evidence where required. We can also provide preliminary case assessments — an early-stage review of the available evidence and an honest opinion on whether a claim has sufficient merit to proceed, and if so, the approximate quantum range — before a full expert report is commissioned.
For defendants and their insurers, we provide defence-side reports and reviews of claimant expert reports, identifying the methodological, evidential and legal weaknesses on which the defence can be built.
The Value of an Early Expert Assessment
One of the most cost-effective uses of expert witness input is at the earliest stage of a case — before significant costs are incurred and before positions harden. A preliminary assessment by an experienced financial expert can identify whether a claim has merit, what the approximate quantum range is, whether the available evidence is sufficient to support the methodology required, and what additional evidence needs to be obtained before a full report can be produced.
For claimant firms managing large volumes of cases — as is common in PPI, motor finance and irresponsible lending — early expert triage can significantly improve the quality of the case portfolio, identify the strongest cases for early progression, and ensure that cases without sufficient evidence or merit are not pursued at unnecessary cost.
For defendants and insurers, early expert review can identify cases where the claim is overstated, where the methodology applied by the claimant's expert is unsound, or where the facts do not support the liability alleged — enabling early and informed decisions about settlement or defence.
Instructing Rivermead
We work with law firms, claims management companies, financial institutions and their insurers across the full range of financial services litigation. Instructions can be placed directly with Simon Dorrell at The Rivermead Partnership Ltd. We are happy to discuss a case informally before a formal instruction is placed — an initial conversation costs nothing and will quickly establish whether we are the right expert for the instruction and what the report will require.
To discuss an instruction or request a preliminary case assessment, please request a call back and we will be in touch promptly.