The issue of illegality as a defence in clinical negligence actions is controversial. It typically arises in a rare category of cases in which alleged failures of medical care results in a patient (the Claimant) suffering a psychotic episode. As a result of the psychotic episode, the Claimant then commits a criminal act. This leads to a prosecution and conviction, and potentially pecuniary and non-pecuniary losses. Should a Claimant be permitted to sue the negligent clinician who failed to treat the underlying condition?
The Court of Appeal recently considered and reviewed this tricky area of law in Henderson v Dorset Healthcare University NHS Foundation Trust [2018] EWCA Civ 1841.
The facts in Henderson were that the Claimant, who had been diagnosed with paranoid schizophrenia stabbed and murdered her mother during a relapse. It was admitted by the Defendant that it was in breach of duty, and that but for that breach the relapse (and murder) would not have taken place. The Claimant was prosecuted and convicted of manslaughter by reason of diminished responsibility. Damages were claimed by the Claimant for resulting losses.
Angus Moon QC and Cecily White acted for the Defendant Trust, and argued that the status quo (i.e. that an individual cannot recover damages for losses arising out of a criminal act) should continue. The Court of Appeal agreed. It also affirmed the distinctions within this rule and the reasons why the rule exists.