Modern Slavery Compensation: Routes to Redress for Trafficking Survivors

Modern slavery, encompassing human trafficking, forced labour, and domestic servitude, represents one of the most severe forms of interpersonal trauma encountered in medico-legal practice. Survivors frequently present with complex psychological sequelae, including post-traumatic stress disorder (PTSD), complex PTSD (CPTSD) under ICD-11, dissociative disorders, and enduring personality change following catastrophic experience. For solicitors acting in abuse injury claims, understanding the interplay between clinical presentation, legal frameworks, and compensation routes is essential to securing appropriate redress for claimants.

This article examines the principal avenues for modern slavery compensation in the UK, the role of multi-disciplinary expert witnesses, and the clinical considerations that underpin robust medico-legal assessment.

Clinical Context: Trauma Frameworks in Modern Slavery

Modern slavery constitutes protracted interpersonal trauma, often characterised by coercive control, physical violence, and psychological manipulation. The clinical presentation of survivors may align with the ICD-11 criteria for CPTSD, which extends beyond the core symptoms of PTSD to include disturbances in self-organisation: affective dysregulation, negative self-concept, and relational difficulties. These features are particularly relevant in medico-legal practice, where expert witnesses must differentiate between acute stress reactions, chronic trauma responses, and pre-existing vulnerabilities.

Key clinical considerations include:

• Developmental trauma: Survivors trafficked as minors may exhibit attachment disruptions, consistent with Bowlby’s attachment theory, and adverse childhood experiences (ACEs) that compound long-term psychological harm.
• Betrayal trauma: Where perpetrators are familial or trusted figures, delayed disclosure patterns may emerge, complicating limitation arguments in civil claims.
• Coercive control: The Serious Crime Act 2015, Section 76, provides a legal framework for assessing psychological abuse, which may inform expert opinion on sustained psychological harm.
• Dissociation: Chronic trauma exposure can lead to dissociative symptoms, which may affect memory recall and symptom validity during forensic assessment.

In paediatric cases, safeguarding failures may give rise to claims under the Human Rights Act 1998, Article 3 (prohibition of inhuman or degrading treatment). Expert witnesses must evaluate whether local authority duties to investigate, under the Children Act 1989 and relevant statutory guidance, were met. Paediatric indicators of non-accidental injury (NAI), such as inconsistent histories or delayed presentation, may require multi-disciplinary input from consultant paediatricians and clinical psychologists.

Legal Routes to Compensation

Survivors of modern slavery may pursue compensation through three primary avenues: civil claims, the Criminal Injuries Compensation Authority (CICA), and, in limited circumstances, public authority claims under the Human Rights Act 1998. Each route presents distinct evidential challenges and procedural requirements.

Civil Claims: Liability and Quantum

Civil claims for modern slavery compensation typically proceed on the basis of negligence, vicarious liability, or direct liability for breach of duty. Key legal principles include:

• Vicarious liability: The Supreme Court’s decision in Various Claimants v Barclays Bank plc [2020] established that organisations may be vicariously liable for the actions of independent contractors where a relationship akin to employment exists. This principle has been applied in institutional abuse claims, including those involving trafficking networks.
• Duty of care: In Armes v Nottinghamshire County Council [2017], the Supreme Court held that local authorities could be vicariously liable for abuse perpetrated by foster carers. While not directly analogous to modern slavery, the case underscores the potential for public authority liability where safeguarding failures are alleged.
• Limitation: The Limitation Act 1980, Section 33, permits the disapplication of time limits where it is equitable to do so. The House of Lords’ decision in A v Hoare [2008] emphasised the relevance of delayed disclosure science in historic abuse claims, a principle equally applicable to trafficking survivors.

Quantum assessments in civil claims require expert evidence on condition and prognosis, care needs, and loss of earnings. The Smith v Leech Brain [1962] eggshell skull principle applies: defendants must take claimants as they find them, including pre-existing vulnerabilities exacerbated by trauma.

Criminal Injuries Compensation Authority (CICA)

The CICA scheme provides a tariff-based route to compensation for victims of violent crime, including modern slavery offences. Key considerations include:

• Mental injury tariffs: The scheme categorises psychological harm into bands, with awards ranging from £1,000–£27,000 for mental injury alone. Expert witnesses must align clinical findings with the CICA’s tariff descriptors, which may not fully capture the nuances of CPTSD or complex trauma.
• Same-roof rule: Reforms to the scheme in 2019 removed the historical exclusion for injuries sustained before 1 October 1979 where the victim and perpetrator lived as members of the same family. This change may benefit survivors trafficked by familial networks.
• Time limits: Applications must generally be made within two years of the incident, though extensions may be granted where there is good reason for delay. Trauma-related amnesia or coercive control may justify late submissions.

Expert witnesses preparing reports for CICA claims must adhere to the scheme’s specific requirements, including the use of standardised psychometric tools such as the International Trauma Questionnaire (ITQ) for CPTSD or the PTSD Checklist for DSM-5 (PCL-5).

Public Authority Claims

Where state actors, such as the police or local authorities, are alleged to have failed in their operational duties, claims may proceed under the Human Rights Act 1998. The Osman v UK [1998] duty to protect life under Article 2, and the Michael v Chief Constable of South Wales Police [2015] principles on operational failures, may apply where trafficking risks were known but unaddressed.

Expert witnesses in such cases may be instructed to opine on whether investigative failures contributed to the claimant’s harm, or whether safeguarding duties under the Modern Slavery Act 2015 were breached. Multi-disciplinary input, combining psychiatric, psychological, and paediatric expertise, is often necessary to address the full spectrum of harm.

Role of the Expert Witness

In modern slavery compensation claims, expert witnesses play a pivotal role in bridging clinical presentation and legal argument. The Civil Procedure Rules (CPR) Part 35 imposes a duty on experts to assist the court impartially, a requirement that is particularly salient in cases involving complex trauma and delayed disclosure.

Multi-Disciplinary Assessment

Given the multi-faceted nature of modern slavery harm, a single-discipline approach is rarely sufficient. A typical expert panel may include:

• Consultant psychiatrists: To diagnose and quantify mental disorders, including PTSD, CPTSD, and dissociative disorders, under ICD-11 or DSM-5 criteria.
• Clinical psychologists: To administer psychometric tools (e.g., ITQ, PCL-5, DES-II) and assess symptom validity, particularly where memory gaps or secondary gain concerns arise.
• Consultant paediatricians: In cases involving minors, to evaluate physical and developmental sequelae, including attachment disruptions and safeguarding failures.

Joint expert reports, prepared under CPR Part 35.12, can streamline proceedings by consolidating clinical opinion on liability, causation, and quantum. However, where disputes arise, separate expert reports may be necessary to address conflicting interpretations of trauma presentation.

Trauma-Informed Methodology

Trauma-informed assessment is critical to avoid re-traumatisation and ensure accurate clinical findings. Key principles include:

• Safety: Conducting assessments in a secure, private setting, with clear explanations of the process to build trust.
• Choice: Offering claimants control over the pace and structure of interviews, including breaks and the option to pause or terminate the session.
• Collaboration: Working with interpreters or cultural mediators where language or cultural barriers exist, to ensure informed consent and accurate communication.
• Empowerment: Validating the claimant’s experiences while avoiding leading questions that may contaminate recall.

Expert witnesses must also be mindful of secondary victimisation, where insensitive questioning or sceptical attitudes exacerbate psychological harm. The use of structured clinical interviews, such as the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5), can standardise assessment while minimising distress.

Common Pitfalls and Disputes

Modern slavery compensation claims frequently give rise to contentious issues, including:

• Causation: Defendants may argue that psychological harm predated the trafficking experience, or that pre-existing vulnerabilities (e.g., childhood adversity) account for the claimant’s presentation. Expert witnesses must conduct a thorough review of medical records and collateral information to disentangle trauma sequelae from baseline functioning.
• Symptom validity: Where secondary gain concerns are raised, experts may administer validity tests such as the Structured Inventory of Malingered Symptomatology (SIMS) or the Test of Memory Malingering (TOMM). However, these tools must be interpreted cautiously in trauma populations, where dissociative symptoms or memory gaps may mimic malingering.
• Limitation: In historic cases, defendants may challenge the credibility of delayed disclosures. Expert witnesses can draw on betrayal trauma theory and delayed disclosure science to explain why survivors may only come forward years after the events.
• Quantum: Disputes often arise over the appropriate care regime or loss of earnings calculations. Experts must provide evidence-based recommendations, grounded in clinical guidelines (e.g., NICE guidance on PTSD management) and vocational rehabilitation principles.

Practical Guidance for Solicitors

Solicitors instructing expert witnesses in modern slavery compensation claims should consider the following steps to strengthen their client’s case:

• Early instruction: Engage experts at the outset to ensure timely assessment and avoid procedural delays. Early input can also inform witness statement preparation, ensuring trauma-sensitive language and structure.
• Comprehensive records: Collate all relevant medical, social care, and safeguarding records, including GP notes, mental health service contacts, and local authority chronologies. These documents are critical for establishing the timeline of harm and identifying pre-existing vulnerabilities.
• Trauma-sensitive preparation: Brief claimants on the assessment process, including the purpose of psychometric tools and the importance of honest disclosure. Avoid pressuring claimants to recount traumatic events in detail during initial interviews.
• Multi-disciplinary collaboration: Where possible, instruct a panel of experts (psychiatrist, psychologist, paediatrician) to provide a holistic assessment of harm. This approach is particularly valuable in cases involving minors or complex trauma presentations.
• CICA-specific considerations: For CICA claims, ensure expert reports align with the scheme’s tariff descriptors and include clear recommendations on mental injury bands. Highlight any factors that may justify a tariff uplift, such as the severity or chronicity of symptoms.

In civil claims, solicitors should also be mindful of the potential for group litigation, particularly where multiple survivors have been trafficked by the same network or institution. The principles established in Various Claimants v Barclays Bank plc [2020] may apply, enabling claimants to pursue collective redress.

Conclusion

Modern slavery compensation claims present unique medico-legal challenges, requiring a nuanced understanding of trauma frameworks, legal principles, and procedural rules. For solicitors, securing redress for survivors hinges on the quality of expert evidence, the robustness of clinical assessment, and a trauma-informed approach to litigation.

Expert witnesses with experience in abuse injury claims can provide pivotal evidence in such cases—particularly where complex trauma presentations, limitation issues, or multi-disciplinary questions arise. By combining psychiatric, psychological, and paediatric expertise, solicitors can build compelling claims that reflect the full extent of the survivor’s harm and secure appropriate compensation.