I have given oral evidence in Family Court over 100 times. Contested final hearings, fact-finding hearings, and the occasional interim hearing where something unexpected surfaced. Some of those days in the witness box were straightforward. Others were gruelling, with sustained cross-examination over several hours from multiple barristers. I have learned something from nearly every one of them, and most of what I have learned has nothing to do with presentation skills or courtroom technique. It has to do with preparation, intellectual honesty, and understanding what the court actually needs from an expert.
Re-read your own report
This sounds obvious, but it is the single most important thing you can do before giving evidence, and it is the thing experts most often neglect. I do not mean skim it the night before. I mean sit down with the full report, a pen, and enough time to re-read every section properly. You wrote it weeks or months ago. You have worked on other cases since then. The detail will not be as fresh as you think it is.
When I re-read my reports before a hearing, I am looking for specific things. I want to remind myself of the evidential basis for each recommendation. I want to identify the parts of the analysis that are most vulnerable to challenge. I want to know, for every conclusion I have reached, exactly why I reached it and what evidence supports it. If I cannot answer that question for a particular finding, I know that is where the cross-examination will land.
I also revisit the key documents I relied on. If my analysis references a particular social work chronology, a medical report, or a police disclosure, I want to be able to locate the relevant passage quickly. Being able to say "that is addressed at paragraph 47 of the local authority's chronology" carries more weight than a vague reference to something you half remember.
Anticipate the challenges
Every report has points of contention. If your assessment recommends that a child should not be returned to a parent's care, the parent's legal team will challenge the analysis that led to that recommendation. If you have identified risks that the local authority did not, their barrister may question your methodology. None of this should come as a surprise.
Before every hearing, I sit down and think about the case from the perspective of each party. What would I challenge if I were representing the mother? What would the father's barrister focus on? Where might the guardian disagree with my analysis? This is not about preparing scripted answers. It is about making sure I have thought through my reasoning carefully enough that I can explain it clearly under pressure.
The most effective cross-examination I have experienced has not been aggressive or theatrical. It has been methodical. A good barrister will take you through your analysis step by step, looking for the point where the evidence does not quite support the conclusion. If you have anticipated that and thought about it honestly, you will be able to explain your reasoning. If you have not, you will flounder.
Cross-examination is not like television
New experts sometimes arrive at court expecting something adversarial and confrontational. Family Court cross-examination is rarely like that. It is focused, structured, and usually polite. The barristers are not trying to catch you out for sport. They are testing your analysis on behalf of their client, and they have a professional obligation to do so.
That said, some cross-examination is uncomfortable. You may be asked why you reached a particular conclusion when other professionals reached a different one. You may be pressed on whether you gave sufficient weight to a piece of evidence. You may be asked to consider a scenario you did not address in your report. All of this is legitimate. The court needs to understand the strengths and limitations of your analysis, and cross-examination is how that happens.
The biggest adjustment for new experts is learning to listen to the question being asked and answer that question, rather than the question you wish had been asked. If the question is narrow, answer it narrowly. If it requires a longer explanation, say so and give it. Do not volunteer information that has not been asked for, and do not try to steer the conversation back to your strongest points. That is not your job. Your job is to help the court by answering questions honestly and clearly.
The value of "I don't know"
One of the most important things I have learned in over a decade of giving evidence is that "I don't know" is a perfectly acceptable answer. So is "that falls outside the scope of my assessment," or "I would need to consider that further before giving a definitive answer," or "that is a fair point and I accept it."
Judges notice when an expert tries to answer every question, regardless of whether they actually have the knowledge or evidence to do so. They also notice when an expert becomes defensive and digs in on a point that has been effectively challenged. Neither of those responses serves the court well. What serves the court is an expert who is honest about the limits of their knowledge and their analysis, who can distinguish between what they know and what they are inferring, and who is willing to concede a point when the challenge is a good one.
I have changed my position in the witness box on more than one occasion. Not on the fundamental analysis, but on the weight I gave to a particular factor or the way I framed a specific finding. That is not a sign of weakness. It is a sign that you are actually engaging with the questions rather than defending a predetermined position. The court wants an expert, not an advocate.
Common mistakes I have seen
Over 100 hearings, I have watched other experts give evidence as well as giving my own. Some patterns come up repeatedly. The most common mistake is becoming defensive. When a barrister challenges your analysis, they are doing their job. If you respond as though you are being personally attacked, it undermines your credibility. Stay measured, stay calm, and engage with the substance of the question.
Another common mistake is departing from the report. If your written analysis says one thing and your oral evidence says something different, you have a problem. The report is the evidence. Your oral evidence should explain and elaborate on it, not contradict it. If you have genuinely changed your view since writing the report, say so clearly and explain why. But that should be rare, not routine.
I have also seen experts offer opinions on matters that fall outside the scope of their instruction. If you were instructed to assess parenting capacity and you start giving evidence about contact arrangements that you were not asked to assess, you are on thin ice. Stay within the boundaries of what you were asked to do and what the evidence supports.
Finally, some experts do not prepare adequately. They arrive at court having not re-read the report for weeks, struggle to locate the evidence that supports their findings, and give vague answers to specific questions. This is avoidable. Preparation is not optional. It is the foundation of credible expert evidence.
Your analysis matters more than your delivery
I want to be clear about something. None of what I have described above is about performance. It is not about how confidently you speak, whether you make eye contact with the judge, or how composed you appear under pressure. Those things matter at the margins, but they are not what determines whether your evidence is useful to the court.
What matters is the quality of your analysis. A well-reasoned, evidence-based assessment will withstand cross-examination even if the expert giving evidence is nervous, hesitant, or visibly uncomfortable. A poorly reasoned assessment will not survive scrutiny no matter how polished the delivery. The witness box tests the work, not the worker. If the work is thorough, honest, and properly evidenced, the oral evidence will follow.
That is the reassurance I would offer to any social worker or expert witness who finds the prospect of giving oral evidence daunting. It is not a test of your personality or your composure. It is a test of your analysis. If you trust your analysis, you can trust yourself in the witness box.
If you are a solicitor looking to instruct an ISW who is experienced in giving oral evidence, my guide for solicitors on instructing an independent social worker covers the full process from initial enquiry through to the final hearing.