When Solicitors and Case Managers should Instruct a Speech and Language Therapist (SLT)

Speech and Language Therapists (SLTs) provide specialist expertise that is often essential in cases involving decision‑making, communication vulnerability, mental capacity, and best‑interests processes.

For solicitors and case managers, knowing when to instruct an SLT can significantly strengthen the evidential basis of a case, reduce risk, and ensure that assessments and decisions are legally defensible.

This page outlines the key scenarios where SLT involvement is not only beneficial but necessary.

Communication

You may want to refer to Speech and Language Therapy if someone has noticed changes in a persons communication.

This could involve language (finding words, understanding conversation, reading or writing), motor speech (speech that has become slurred, slow, quiet or harder for others to understand), or changes related to cognition, such as difficulty following conversations, staying on topic or organising thoughts.

A referral is appropriate when these changes mean the person can no longer take part as fully as they did before. For example, communication may have become less effective in relationships and friendships, at work or in education.

They may find it harder to speak up for themselves and make their wishes known, or the changes may have affected their confidence and quality of life.

Eating, Drinking and Swallowing

You may want to refer to Speech and Language Therapy if someone is having difficulties with eating, drinking or swallowing (also known as dysphagia).

Signs include coughing or choking when eating or drinking, unexplained weight loss, or repeated chest infections. A person may begin avoiding certain foods or drinks, change their usual mealtime habits, or find they no longer enjoy mealtimes as they once did.

If these changes are affecting their health, wellbeing or ability to take part in mealtimes and social occasions as fully as before, our team can assess the difficulties and offer support.

When Communication Disorders May Affect Decision‑Making Capacity

Solicitors should instruct an SLT when a client’s ability to understand, retain, weigh information or communicate a decision may be impaired due to:

  • Acquired brain injury
  • Stroke or neurological conditions
  • Learning disability
  • Dementia or cognitive decline
  • Mental health conditions affecting communication
  • Developmental communication disorders
  • Progressive conditions (e.g., MND, Parkinson’s)

SLTs provide specialist assessment to determine whether the client cannot make a decision, or whether they can, but require communication support. This distinction is critical in MCA compliance and litigation.

When There Is a Risk of Wrongful Findings of Incapacity

SLTs protect clients from being incorrectly deemed to lack capacity due to communication barriers. An SLT should be instructed when:

  • An assessor reports “non‑engagement”, “limited insight”, or “inability to weigh information”.
  • The client appears inconsistent, confused, or overly compliant
  • The client struggles with verbal reasoning or complex language.
  • There is concern about undue influence or suggestibility.
  • The assessment environment may not have been communication‑accessible.

SLTs ensure the client is given every lawful opportunity to demonstrate capacity.

When Best‑Interests Decisions Require Clear Evidence of Wishes and Feelings

If a client lacks capacity, an SLT can help elicit and interpret their preferences using accessible communication methods. An SLT should be instructed when:

  • The client’s wishes are unclear or difficult to interpret.
  • Family members disagree about what the client wants.
  • Behaviour is being misinterpreted as preference or refusal.
  • The MDT needs structured communication support to represent the client’s voice.
  • A best‑interests meeting requires defensible, person‑centred evidence.

SLTs ensure the client’s values and preferences are accurately represented.

When Communication Vulnerability May Affect Legal Processes

SLTs provide expert evidence on how communication difficulties influence:

  • Reliability of testimony.
  • Susceptibility to coercion or undue influence.
  • Ability to participate in legal interviews or meetings.
  • Understanding of legal concepts (e.g., risk, consent, consequences).
  • Capacity to instruct a solicitor.

Solicitors should instruct an SLT when communication vulnerability may compromise procedural fairness or the integrity of evidence.

When Reports Need Expert Analysis of Communication, Cognition and Reasoning

SLTs produce medico‑legal reports that address:

  • Cognitive‑communication skills.
  • Executive functioning as it relates to decision‑making.
  • Language comprehension and expression.
  • Ability to weigh information.
  • Environmental and interpersonal communication barriers.
  • Recommendations for lawful, communication‑inclusive assessment.

These reports are frequently used in:

  • Court of Protection proceedings.
  • Personal injury litigation.
  • Clinical negligence cases.
  • Safeguarding enquiries.
  • Mental capacity disputes.

When MDTs Need Guidance on Conducting Communication‑Accessible MCA Assessments

An SLT should be instructed when:

  • Assessors require training or support to phrase questions appropriately.
  • The MDT needs advice on communication‑inclusive practice.
  • There is disagreement about whether the client can participate.
  • The assessment process itself is under scrutiny.

SLTs provide expert guidance that strengthens the defensibility of MCA outcomes.

When Behaviour May Be Misinterpreted as Lack of Capacity

Communication disorders can present as:

  • Apparent non‑compliance.
  • Reduced engagement.
  • Emotional dysregulation.
  • Difficulty weighing options.
  • Inconsistent responses.

SLTs help determine whether behaviour reflects communication impairment rather than incapacity, a distinction that can materially affect legal outcomes.

Summary: Key Triggers for SLT Instruction

Solicitors and case managers should consider instructing an SLT when:

  • Communication difficulties may affect capacity.
  • The client’s wishes are unclear or disputed.
  • There is risk of undue influence or suggestibility.
  • Testimony reliability is in question.
  • Best‑interests decisions require robust evidence.
  • MDTs need support to conduct lawful MCA assessments.
  • Behaviour is being misinterpreted.
  • Communication vulnerability may affect legal fairness.

SLTs provide specialist expertise that strengthens the evidential foundation of medico‑legal work and ensures that clients’ rights under the MCA are upheld.

If you would like to discuss a referral, request a quote, or explore how specialist ABI speech and language therapy can support you or your client, please get in touch.