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MHDR / Forensics and investigations / Expert reports for the courts

Digital evidence · court reporting, Maidenhead

Your instruction, your fee. The court still comes first.

An expert under CPR Part 35 has an obligation to provide assistance to the court and this obligation takes precedence over obligations owed to clients, solicitors and whoever settles the invoice. Therefore, if the report is drafted as advocacy with exhibits attached then it will likely fail to withstand a serious challenge. As such, CPR Part 35 is the basis upon which all other aspects of an expert's involvement are based.

Court-ready reports under CPR 35 / CrimPR 19 Chain of custody logged Impartial and discreet

Go through it with an engineer
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The parts a court expects to find.

Where the duty liesCPR Part 35 outlines an expert's role as assisting the court within the limits of his/her expertise and positions this role above that of the instructing party's desires. The role of the expert is stated at the beginning of the report and serves as a benchmark against which all subsequent reporting should be measured.
Statements of truth and complianceThe report contains those facts known to the expert personally and confirmed as true by him/her, verifies that he/she holds the opinions expressed therein as genuine and states that nothing has been omitted from the report. Finally, the report certifies that it complies with CPR Part 35 and its practice direction.
The method and the exhibitsEach stage of receipt, acquisition, verification of hash values, examination of the evidence and location of the exhibit during the course of the investigation is described in sufficient detail that an opposing examiner could replicate each stage.
Matters open to challengeSince 2019, the criminal rules have required experts to disclose all matters affecting credibility, including lack of accreditation. Our lack of accreditation is outlined in the initial pages of our reports and not hidden away in a footnote.

Matching the report to the matter.

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Which reportWhen it appliesWhat's in it
Ordinary findings reportAny early advice, HR files or board-level decisionsA clear explanation of what was found, how that finding was reached, and what those findings mean in everyday language
Report for insurers and to support loss claimsWhen either cause, extent or liability is at issueA report detailing the evidence supporting the findings, exhibits used during investigation and a separate section addressing the causality of events
CPR Part 35 reportCivil proceedings in England and WalesThe overriding duty is clearly stated; the instruction given to the expert witness is fully documented; the methods employed throughout the investigation are detailed and all declarations of truth and compliance with the CPR Part 35 rules have been signed
CrimPR Part 19 reportCriminal matters (criminal courts)As above, in criminal form: qualifications & reliability material, with credibility declared
Single joint expert instructionCourt-directed instruction: a single expert serves both sidesA single report provided to all parties alike, with the court above both
When posting: there is no counter in Maidenhead, so most cases will arrive this way. First get a quote either via phone or using our quote form. Post it to the Guildford intake lab, with tracking and postage insurance, or drop it off there (Monday to Friday, 9am to 5:30pm, no appointment needed). We cover the cost of sending it back to you. For CCTV recorders, send the recorder's disk, not the recorder itself. To submit footage from cameras such as those on your car (dash cam) or from a body-worn camera, simply post the memory card used within these devices (i.e., SD card), not the device itself; memory soldered into the camera is not taken on. If you're unsure about what type of memory the camera uses, contact us before sending. For forensic work, the exhibit will travel whole once the instruction is agreed. This is part of maintaining the chain of custody. If you would rather talk the packing through, please call us before you pack anything up and we'll walk you through it. More detailed information regarding postage is available on the postage page.

The work, stage by stage.

The full casebook →
01

A quiet briefing first, then a price in writing Free

All instructions commence in confidence. First outline the incident, the devices and accounts involved in the incident and what the evidence needs to prove; this establishes the scope, and once established, it also sets the single written quote you will be provided prior to any examination commencing. The scoping discussion is free.

ConfidentialOne fixed quote, in writingExactly what must be proved
02

Put on the table first

A summary of your letter of instruction will be recorded and included within the report itself. We document everything that may relate to our credibility (beginning with an independent laboratory that has no accreditation) prior to conducting the examination, rather than letting it surface later under cross-examination.

Instruction summarisedCredibility declared early
03

Made to be picked apart

All steps are expected to be scrutinised line by line by an opposing expert, and therefore we perform them accordingly and write them down likewise, so that there will be no surprises when this occurs. Our conclusions do not bend towards the party who instructed us.

Court ahead of the clientConclusions do not shift
04

Built to the court's form

Form varies depending upon whether it is a civil or criminal action (CPR Part 35 / Criminal Procedure Rules Part 19), each with complete methodology & exhibits, a continuity record (no gaps) & two declarations. Conclusions precede the technical annex.

CPR 35 or CrimPR 19 formatFindings in plain English
05

Hashed, logged, ready to disclose

When all aspects of the case are handed over to another entity (report, exhibits, source files, hash values, continuity log and bench notes), a tribunal, or another expert who has been instructed against you, may replicate the work and obtain the same result(s).

Report and exhibitsHash values logged, custody intactStands up to scrutiny

Rules the bench works to

  • The overriding duty supersedes other duties: the court's interests take precedence over those of the instructing party, and a report prepared without knowledge of this will fail prior to being read by the court.
  • Reliability material is required in criminal work: qualifications/experience etc., as required by the court, before it can place a value upon an opinion.
  • A joint appointment changes the arithmetic: two sets of instructions, one examiner and no side to be taken. We are willing to accept this work as part of our service.
  • Clarity is part of compliance: if a report cannot be followed by the bench then it has failed in its duty, regardless of how good the working underneath it may have been.

Ask any expert before you engage them: since April 2019, criminal practice directions want whatever might diminish confidence in an expert's reliability to be outlined, with the absence of an accreditation expressly included. Failure to do so means that it will become the case's problem and not the expert's. Every report we produce opens with this disclosure.

From the casebook, lately.

MH · MHD-2026-6534ON RECORD ✓

Two Buckinghamshire companies, one folder, one Part 35 report

Two companies had accounts that would not match up. There was also a folder missing between the two versions of their accounting files. Neither version had come through image capture untouched, and the timeline clearly demonstrated this. The case settled within a month.

Disposed of post-exchangeCPR 35 compliant

Before it comes to the lab.

Do these now

  • Tell us at the start whether proceedings are possible; this alters the method
  • Give us the letter of instruction early
  • Please share with us anything that the other side's expert requests from us
  • Provide weeks, rather than days; a thoroughly written report cannot be rushed

Things best not done

  • Demand a conclusion based on evidence that does not support such a conclusion
  • Change our language; challenge the logic behind the reasoning on merit instead
  • Expect to obtain a Part 35 report within seven days
  • First find a professional who will agree before you start; the bench sees this

The questions people ask privately.

How does an expert witness report differ from a findings report?

A findings report answers the questions you wanted answered and explains how we came up with the answers. A court report includes additional items such as the overriding duty recorded, an instruction summary, methodology and continuity in full, a statement of truth, a declaration of compliance, and disclosure of anything that may be adverse to the expert.

Which party does an expert act for?

Neither side, whatever the fee arrangement suggests. The duty to assist the court takes precedence over the obligation owed to the instructing party. This hierarchy is what makes the report valuable.

Would you accept a single joint appointment?

Yes. One report will be generated under a joint appointment. Both sides receive this identically worded report simultaneously, without either having seen the report before the other.

Will the absence of accreditation damage the case?

Because the rules call for it to be disclosed, it is disclosed at the beginning of the report. What the court ultimately evaluates is methodology because this is where the report's credibility lies. The over-statement of a report, and not lack of accreditation, is what leads to the breakdown of a report.

The recorder is already writing over it.

Recording in a loop is already overwriting your needed evidence, and the deadline will not move. There is no cost associated with opening a case today: diagnoses are free and remain completely confidential.

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