Litigation Intelligence · Service

CPR Part 35 Expert Report

A CPR Part 35 compliant expert report on digital evidence, cyber incidents, or OSINT findings, prepared for use in civil proceedings.

The Problem

An expert report that does not comply with CPR Part 35 can be excluded before it is even read on its merits.


Civil proceedings that turn on digital evidence, a cyber incident, an authenticity question, an open-source finding, require an expert report that meets the specific procedural requirements of CPR Part 35: independence from the instructing party, a statement of truth, a clear statement of the expert's qualifications and the basis for their opinion, and a report structure the court and opposing counsel can properly test. A technically sound analysis prepared without attention to those requirements can be challenged or excluded on procedural grounds alone, regardless of its substance. The same discipline applies in reverse: when an opposing party serves an expert report on the same class of evidence, it needs to be tested on its actual substance, methodology, assumptions, and the confidence level claimed against what the underlying data supports, not dismissed on general scepticism alone.

What's Included

What you receive.


A CPR Part 35 compliant expert report addressing the specific digital or intelligence question in your matter, prepared with full procedural compliance, a clear statement of methodology and qualifications, and a conclusion structured to withstand cross-examination. Where an opposing expert has already reported, the same service covers an independent rebuttal, addressing that report's methodology, assumptions and conclusions directly and re-examining the underlying evidence where accessible.

Full CPR Part 35 procedural compliance, including the statement of truth

Clear statement of the expert's qualifications and independence

Methodology disclosed in enough detail to be properly tested

Findings stated with appropriate confidence levels, not overstated

Available for a single joint expert instruction or party-appointed instruction

Independent rebuttal of an opposing expert's report, point-by-point, where one has already been served

Methodology

How it's produced.


Analysis conducted to the specific technical question instructed, documented with full chain of custody and methodology disclosure, and drafted to CPR Part 35 procedural requirements throughout. Where the instruction is a rebuttal, the same underlying evidence and data the opposing report relies on is independently re-examined and tested against our own methodology, with discrepancies and unsupported claims identified specifically rather than through general critique. Every report is reviewed for compliance before delivery.

Timeline

What to expect, and when.


Typical turnaround: Scoped to your case timetable and the complexity of the underlying analysis; typically 2 to 4 weeks from confirmed instruction for an original report, or scoped to the court timetable for service of rebuttal evidence, typically 2 to 3 weeks, for a rebuttal.
Frequently Asked

Questions we're asked most


Can you act as a single joint expert?

Yes, where both parties agree, and the same independence and procedural discipline applies whether instructed jointly or by a single party.

What areas of expertise does this cover?

Digital evidence and forensics, cyber incident analysis, and open-source intelligence findings, consistent with the disciplines covered across our Cyber and AI & Synthetic Intelligence capabilities.

Can the expert be called to give oral evidence?

Yes, and the report is prepared throughout with that possibility in mind, with the underlying methodology and evidence available to withstand cross-examination.

How is independence maintained if we are instructing the report?

The expert's duty is to the court, not to the instructing party, and the report is drafted and conclusions reached independently of what any party might prefer the finding to be.

Can this rebut an expert report from the other side?

Yes. Where an opposing party has served an expert report on digital evidence, a cyber incident, or an open-source finding, we can independently re-examine the underlying evidence where accessible and test the report's methodology and conclusions, prepared to the same CPR Part 35 procedural standard as the report it responds to.

What if the opposing report turns out to be sound?

That is reported honestly. Our duty is to the accuracy of our own findings, not to producing a rebuttal that supports your position regardless of what the evidence shows.

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