Assessing neurodevelopmental conditions in care proceedings: a guide for instructing solicitors

Diagnostic Specificity in Adult Populations

In public law care proceedings, the assessment of neurodevelopmental conditions such as Autism Spectrum Disorder (ASD) and Attention Deficit Hyperactivity Disorder (ADHD) in parents frequently informs the parenting capacity assessment. These conditions, which often manifest with executive dysfunction, difficulties with emotional regulation, and impairments in social communication, require careful identification to ensure they are not misconstrued as personality pathology or simple parental disengagement. For instructing solicitors and barristers, ensuring that an assessment of neurodevelopmental functioning is performed by a practitioner with specific expertise is essential to obtaining evidence that meets FPR Part 25 and Practice Direction 25B.

The diagnostic framework for adults differs from the assessment of children. Clinicians must demonstrate evidence of the condition manifesting in childhood, even if full diagnostic criteria were only met later in life due to compensating strategies or ‘masking’. In family law contexts, reliance on historical school reports, GP records, and witness statements from family members is necessary to validate the developmental history. Experts should be expected to use validated diagnostic frameworks; however, psychometric screening tools alone are generally insufficient to meet the standard required for a definitive diagnosis in court.

The Intersection of Neurodevelopment and Parenting Capacity

Neurodevelopmental conditions do not automatically equate to a deficit in parenting capacity, nor do they confer immunity from the impact of substance misuse or domestic abuse. The medico-legal challenge lies in distinguishing between an inherent cognitive or social-communication deficit and learned behavioural patterns. A common risk is the failure to distinguish between ADHD-related impulsivity and the cycles of coercive control. Experts should address how a parent’s neuro-atypicality affects their ability to engage with local authority interventions, maintain professional appointments, or implement protective strategies. If a parent is found to have a neurodevelopmental condition, the assessment may inform whether this constitutes a ‘disability’ under the Equality Act 2010, which is relevant to the consideration of reasonable adjustments by the local authority.

Procedural Compliance and Expert Selection

Under FPR Part 25, expert evidence must be necessary to assist the court in resolving proceedings. In children proceedings issued on or after 20 July 2026, the court can give permission only for evidence from a regulated expert, such as a GMC-registered psychiatrist or HCPC-registered psychologist, unless an exception in FPR r.25.5A applies. The choice of expert is central to this requirement. An adult psychiatrist may have the forensic experience required for risk assessment but may lack the specific knowledge required to diagnose ASD or ADHD in an adult. Conversely, a clinical psychologist might have extensive expertise in psychometric testing but may not be best placed to provide an opinion on the psychiatric implications of comorbid mental illness. Solicitors should ensure the expert’s CV specifically highlights experience in the diagnostic criteria for neurodevelopmental disorders. Medical Expert Chambers’s guidance on neurodevelopmental expert guidance examines the same instruction questions in more depth.

• Ensure all primary educational and health records are collated and provided alongside the letter of instruction.
• Request that the expert distinguishes between lifelong neurodevelopmental traits and acquired psychiatric symptoms.
• Clarify whether the expert is asked to provide a formal diagnosis or to comment on functional limitations relevant to care planning.
• When instructing two experts, consider whether the court should direct a discussion between them and a statement of agreement and disagreement (FPR r.25.16 and Practice Direction 25E), keeping the discussion within their respective areas of expertise.
• Practice Direction 25C expects expert evidence in children proceedings to come from a single joint expert wherever possible; where the court directs one (FPR r.25.11), the instructions should be set out in a jointly agreed letter (r.25.12).

Avoiding Common Medico-Legal Pitfalls

A frequent error is ‘diagnostic overreach,’ where an expert attributes all parental failures to a suspected neurodevelopmental condition without adequate evidence of historical impairment or functional impact. Conversely, ignoring neurodevelopmental impact can lead to unfair assessments, where parents are penalised for difficulties that might be mitigated through tailored support. Experts should be asked to consider the prognosis of the condition in the context of the proposed care plan. Where an expert is instructed as a single joint expert, their overriding duty remains to the court under FPR r.25.3, and they should clarify the limitations of their findings, particularly where diagnostic clarity is hindered by the absence of collateral history or the presence of substance-induced symptoms.