How to Instruct an Expert Witness: A Guide for Lawyers

This guide on how to instruct expert witness in asylum cases is a practical walkthrough for lawyers and caseworkers commissioning expert evidence. It complements our earlier how to instruct article with focus on efficient instruction management and common pitfalls.[1]

Well-instructed experts produce case-specific reports that decide asylum outcomes; poorly-instructed experts produce generic reports that fail. The instruction process typically takes 30-60 minutes of the legal representative's time but shapes the entire expert output — return on investment is substantial.

Stage 1: Identify the Right Expert

Match expert to case.[2]

Country specialism. Regional specialism where relevant. Profile expertise (women, LGBT, ethnic minorities, government workers). Discipline appropriateness. Tribunal experience. Language fluency where relevant. Availability within deadline.

Finding experts — Right to Remain Toolkit (UK), Asylum Aid, Physicians for Human Rights (US), AILA panels, CCVT/RIVO (Canada), specialised NGO networks.

Stage 2: Approach the Expert

Initial email with:

Brief case summary (2-3 paragraphs). Applicant's country of origin and profile. Procedural stage. Deadline for report. Fee expectations. Legal aid or private funding.

Do not share detailed case documents at this stage. Wait for confirmation of availability.

Stage 3: Engagement Letter

Formal engagement letter contents.[3]

Scope of work — questions to address. Fee — fixed fee or hourly rate. Timeline — draft delivery, final delivery. Cross-examination availability. Expert declaration acceptance — CPR 35 for UK. Confidentiality. Payment terms.

Stage 4: Provide Instructions

Heart of the process. Clear instructions produce clear reports.[4]

Materials Provided

Applicant's witness statement. Refusal letter (if appeal stage). Screening interview transcript. Substantive interview transcript. Home Office/DHS bundle. Supporting evidence bundle.

Specific Questions

Country conditions relevant to profile. Specific risk to applicant on return. Internal relocation viability. State protection availability. Sur place risk (if applicable). Refusal letter response points.

Do not lead the expert to particular conclusions. Independent opinion required.

Stage 5: Expert-Applicant Interview

Many experts prefer to interview applicant directly.[5]

Applicant preparation — brief on process. Interpreter — arrange if needed. Format — in-person, video, telephone. Duration — 1-2 hours typical. Solicitor attendance — often useful. Trauma considerations.

Stage 6: Draft Review

Experts typically provide draft before finalisation.[6]

Review Focus

Factual accuracy — names, dates, places. Currency — recent events reflected. Missing analysis — questions fully addressed. Formal compliance — CPR 35 declaration. Bibliography — sources cited.

What Not To Do

Do NOT ask expert to change opinions. Corrections limited to factual errors, clarifications, formal compliance. Changing expert opinion damages credibility and may breach CPR 35.

Stage 7: Finalisation and Submission

Expert signature and date. Statement of truth. Appendices (CV, bibliography, key sources). Invoice. Availability confirmation for cross-examination. Formal submission with bundle.

Common Pitfalls

Funding Considerations

UK Legal Aid — LAA prior authority required. US pro bono — through KIND, PHR, HIAS, CLINIC. Canada Legal Aid — provincial. EU legal aid — variable. Self-funded — common in US. NGO grants — for specific profiles.

Timeline Planning

Working backwards from deadline:[7]

1. Submission — 1 week before deadline.
2. Draft review — 1 week before submission.
3. Expert drafting — 2-4 weeks after interview.
4. Expert-applicant interview — 1-2 weeks after instructions.
5. Instructions provided — after engagement letter.
6. Engagement letter — 1 week after approach.
7. Initial approach — 8-12 weeks before deadline.

Instruction quality determines report quality. Time invested in clear instructions with proper materials, specific questions, and structured process returns strongly in outcomes. Poor instructions produce generic reports that fail.
UK Free Movement practitioner consensus

Conclusion

Correctly instruct expert witness processes require seven stages — identification, approach, engagement, instructions, interview, draft review, finalisation. Typical lead time 6-12 weeks. Cost £2-4k for UK country experts. Clear instructions matter most. See our companion earlier how-to article, practice direction article, and expert witness guide.