Every expert report I produce is PD25B compliant. It contains a statement of truth, a declaration of my duty to the court, details of my qualifications and experience, and a clear account of the facts and instructions on which my opinion is based. All of that is mandatory, and none of it is what makes a report useful to the court. PD25B is the baseline. It tells you what the report must contain. It says very little about what the report should achieve.
After completing over 225 assessments and giving oral evidence at more than 100 hearings, I have developed a clear sense of what judges actually value in expert evidence. It is not what most experts think it is.
Clarity above everything
The single most valuable quality in an expert report is clarity. Not complexity, not comprehensiveness, not length. Clarity. A judge reading your report has 15 minutes, perhaps 20 if the case is particularly complex, to understand your analysis and your recommendations before moving on to the next document in a bundle that may run to several hundred pages. If your analysis requires three readings to understand, it has failed.
Clarity is not about simplifying your analysis or dumbing it down. It is about structuring your reasoning so that each step follows logically from the last. It is about using plain, direct language instead of professional jargon. It is about writing sentences that say one thing clearly rather than three things vaguely. When I draft the analysis section of a report, I read it back and ask myself whether a non-specialist reader could follow the reasoning. If they cannot, I rewrite it. Not because judges are non-specialists, but because clear writing is clear thinking, and muddled writing is almost always a sign of muddled analysis.
I have seen reports where the assessor clearly understood the family's situation but could not communicate that understanding on the page. The analysis meanders through observations, reflections, and theoretical references without ever arriving at a clear point. The recommendations then appear almost disconnected from what came before. The work may have been thorough, but the writing lets it down, and the court cannot give weight to analysis it cannot follow.
Engaging with contradictory evidence
One of the most common criticisms I hear judges make about expert reports is that they do not engage with contradictory evidence. The assessor reaches a conclusion and presents only the evidence that supports it, ignoring or downplaying the evidence that points in a different direction. This is a serious weakness, and it is one that experienced barristers will exploit immediately in cross-examination.
In most Family Court cases, the evidence does not all point the same way. A parent may have a history of domestic abuse but has also completed a programme and demonstrated sustained change over 18 months. A kinship carer may be motivated and committed but has health difficulties that raise questions about long-term capacity. A child may express a wish to live with a parent whose care the professionals are concerned about. These tensions are not inconveniences to be managed out of the report. They are the substance of the assessment.
When I write my analysis, I make a point of addressing the strongest argument against my recommendation. If I am recommending that a child should not be returned to a parent's care, I will set out the positive evidence about that parent's capacity and explain why, on balance, it does not outweigh the concerns. If I am recommending a placement with a kinship carer, I will address the risks and limitations of that placement honestly rather than presenting it as an uncomplicated solution. Judges can see when an assessor has wrestled with the difficult questions, and they can see when an assessor has avoided them.
Recommendations that follow from the analysis
This sounds obvious, but it is remarkable how often it does not happen. I have read reports where the analysis section discusses five or six competing considerations in some detail, and then the recommendations section appears to have been written by a different person. The recommendations do not reference the analysis. They do not explain how the assessor weighed the competing factors. They simply state what should happen, as if the conclusion were self-evident.
Every recommendation in my reports is explicitly linked to the evidence and analysis that supports it. If I am recommending a specific contact arrangement, I will explain what evidence informed that recommendation and what outcome it is designed to achieve for the child. If I am recommending therapeutic intervention, I will explain what the assessment identified that makes that intervention necessary and what it should address. The court should be able to trace any recommendation back through the analysis to the evidence it rests on. If that chain breaks at any point, the recommendation is vulnerable.
I also make a point of distinguishing between recommendations I can make with confidence and those where the evidence is more finely balanced. Not every recommendation carries the same degree of certainty, and pretending otherwise undermines the credibility of the entire analysis. A judge who sees that you are honest about uncertainty will trust you more, not less, on the points where you are certain.
The difference between expert opinion and advocacy
This is the line that some experts cross without realising it. Your role as an expert witness is to provide independent, evidence-based analysis to assist the court. You are not an advocate for any party. You are not there to support the local authority's care plan, to bolster the parent's case, or to advance the guardian's position. You are there to tell the court what you found, what you think it means, and what you recommend on the basis of your professional analysis.
The distinction matters because advocacy and expert opinion look different on the page, and judges know the difference. Advocacy selects evidence that supports a conclusion. Expert analysis considers all the evidence and explains how it was weighed. Advocacy uses emotive language to persuade. Expert analysis uses measured language to inform. Advocacy presents one outcome as inevitable. Expert analysis explains why one outcome is preferable while acknowledging that others were considered.
I have caught myself drafting passages that lean too far in one direction, where the language becomes less analytical and more persuasive. When that happens, I go back and rewrite. The moment your report starts to read like a closing submission rather than an expert analysis, it has lost its value. The court has advocates. What it needs from you is something different: an honest, independent assessment of the evidence.
Writing for a judge with 15 minutes
Length is not a proxy for thoroughness. I have read 80-page reports that could have been 40 pages without losing any substance, and 30-page reports that were dense with analysis. The question is not how long the report is but whether every paragraph earns its place.
Judges are busy. They are managing full lists, reading multiple bundles, and preparing for hearings across several cases simultaneously. When they pick up your report, they need to be able to find the analysis and recommendations quickly. They need to understand your reasoning without having to decode it. They need the factual sections to be accurate and well-organised so they can cross-reference them with the other evidence.
I structure my reports so that the executive summary gives the court the headline findings and recommendations in two pages. The detailed analysis and recommendations then provide the full reasoning. The factual sections are there for reference and verification. A judge who has 15 minutes can read the executive summary and get a clear picture. A judge who has an hour can read the full analysis. Both should find a report that is structured for their needs.
This approach is not about cutting content. It is about respecting the reader's time and structuring the report so that every section serves a clear purpose. If a paragraph does not advance the analysis or provide evidence that the court needs, it should not be in the report.
Getting it right matters
The quality of expert evidence directly affects the quality of decisions the court makes about children's lives. A clear, balanced, properly evidenced report gives the judge the tools to make a good decision. A vague, one-sided, or poorly structured report makes that task harder. Every assessment I complete is written with the hearing in mind, because that is where the work is tested and where it matters most.
For solicitors looking to instruct an ISW, my guide to instructing an independent social worker covers the process from enquiry to hearing. If you want to understand what should go into a letter of instruction, my guide to the letter of instruction sets out the key elements and common pitfalls.