Background
TLA, an unrepresented litigant, commenced proceedings in December 2021 against Chelsea and Westminster Hospital NHS Foundation Trust, alleging breaches of confidentiality and statutory rights violations spanning from January 2014. The claimant pursued the claim as a litigant in person throughout multiple case management hearings before the High Court without any judicial concern about his fitness to litigate. The claimant’s regulatory complaints achieved partial success: the Parliamentary Health Services Ombudsman upheld three issues in his favour, including a confidentiality breach later admitted by the defendant.
When the defendant instructed Dr. Susan Bradbury, a consultant psychiatrist, to report on causation and prognosis, she opined in her draft report that the claimant lacked capacity to conduct litigation. This triggered a stay of proceedings under Civil Procedure Rules Part 21, requiring the court to determine whether the claimant qualified as a “protected party” requiring a litigation friend. The claimant subsequently obtained expert evidence from Dr. Keren Fisher (clinical psychologist), Dr. Olga Chelidoni (chartered psychologist and mental capacity assessor), and others, all supporting his litigation capacity.
The Court’s Holding
Her Honour Judge Carmel Wall held that the claimant has capacity to conduct these proceedings. The judge applied the Mental Capacity Act 2005 framework, which requires courts to assess functional decision-making ability first—whether the person can understand, retain, and weigh relevant information and communicate decisions—only proceeding to diagnostic assessment if functional impairment is demonstrated. The claimant satisfied all four statutory criteria: he could understand relevant information, retain it, communicate his decision, and critically, use and weigh information in making decisions.
The judge rejected Dr. Bradbury’s contrary opinion as fundamentally flawed. Dr. Bradbury had reversed the proper legal test by beginning with diagnostic criteria (paranoid personality disorder) and viewing the claimant’s decision-making through that diagnostic lens rather than conducting an objective functional assessment. The judge found Dr. Bradbury had conflated “unwise” litigation decisions with incapacity and allowed her clinical instinct to “protect” the claimant from harm to override the statutory test. The claimant’s strong views about the defendant, his antipathy toward evidence against him, and his pursuit of litigation that Dr. Bradbury believed harmful to his mental health did not constitute incapacity.
The judge preferred Dr. Chelidoni’s opinion, which correctly applied the functional test first and identified specific examples of the claimant’s ability to reason through competing considerations, understand procedural options, and weigh factors affecting settlement versus trial. Throughout litigation, the claimant had demonstrated organized decision-making and appropriate courtroom conduct.
Key Takeaways
- Litigation capacity assessment must begin with functional ability (understand, retain, weigh, communicate) and only proceed to diagnostic assessment if functional impairment is shown; reversing this order undermines the entire analysis.
- A litigant’s unwise decisions, strong personal views, lack of objectivity, or antipathy toward a defendant do not equate to incapacity; many capacitous litigants hold passionate views and lack objectivity in their own claims.
- Expert witnesses assessing capacity must avoid allowing clinical concerns about a claimant’s wellbeing or personal judgment about litigation wisdom to override the statutory mental capacity test; capacity and advisability are distinct concepts.
- Unrepresented litigants retain the presumption of capacity unless evidence on the balance of probabilities demonstrates incapacity; the court must adopt a quasi-inquisitorial approach rather than accepting expert opinion uncritically.
Why It Matters
This judgment provides crucial guidance on properly assessing litigation capacity under the Mental Capacity Act 2005, particularly for litigants in person. It establishes that courts must guard against expert evidence that conflates clinical concerns or judgments about litigation wisdom with legal incapacity. The ruling protects the autonomy and procedural rights of self-represented litigants, ensuring that strong beliefs, persistent complaints, or adversarial positioning do not result in wrongful removal from proceedings through a capacity determination. The decision underscores that the functional test must remain distinct from diagnostic assessment and that expert witnesses must follow the correct legal sequence or risk having their opinions substantially undermined.