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Insanity meaning

What does Insanity mean?
Insanity describes the criminal defence used where, because of mental disorder, an accused is not criminally responsible for their conduct at the time of the offence. If proved, the court returns the special verdict of not guilty by reason of insanity (NGRI), with disposals such as hospital, supervision or absolute discharge. It is distinct from automatism and from unfitness to plead. In England & Wales and Northern Ireland, the defence is defined by the M’Naghten rules (R v M’Naghten (1843)), formulated after Daniel M’Naghten’s acquittal. The defendant must show a defect of reason, from a disease of the mind, causing them either not to know the nature and quality of the act or not to know it was wrong. “Disease of the mind” is a legal, not medical, concept. The burden lies on the defence on the balance of probabilities. Procedure and disposals are governed in England & Wales by the Criminal Procedure (Insanity) Act 1964 (as amended). In Scotland, the test is statutory (Criminal Procedure (Scotland) Act 1995, s51A): a person is not criminally responsible if, because of mental disorder, they lacked capacity to appreciate the nature or wrongfulness of their conduct. In Ireland, the Criminal Law (Insanity) Act 2006 codifies...
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View the related News about Insanity

NEWS
Illegality defence and insanity; RTA coupling failure liability; mesothelioma treatment trial; Lords complete Automated Vehicles Bill scrutiny; GDC provisional registration consultation - PI and Clinical Negligence update, 22 February 2024

In this issue: Liability defences Road traffic accidents Other PI and clinical negligence news Useful information Daily and weekly news alerts Liability defences Defence of illegality—ex turpi causa does not apply where a claimant was not guilty by reason of insanity In Lewis-Ranwell v G4S Health Services (UK) Ltd [2024] EWCA Civ 138, the Court of Appeal conducted a comprehensive examination of the illegality defence in tort. By a majority decision—with Lady Justice Andrews dissenting—the court determined that ex turpi causa does not bar a negligence claim founded on conduct that would otherwise be ‘criminal’ (here, the claimant killed three individuals) where the criminal court has found the claimant not guilty by reason of insanity. See: Lewis-Ranwell v G4S Health Services (UK) Ltd [2024] EWCA Civ 138...

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NEWS
Dispute Resolution weekly briefing: CPR consultations, rule/PD updates, key cases (illegality, defamation, non‑party disclosure, cross‑border evidence), HMCTS reforms, court expansion and diary dates—22 February 2024

In this issue: Key DR developments Claims and remedies Cross-border disputes Evidence and disclosure Settlement New content Dates for your diary Articles Useful information Collaborate and network with a community of expert lawyers Daily and weekly news alerts Key DR developments Consultations and appointments CPRC launches consultation on access to court documents by non-parties The Civil Procedure Rule Committee (CPRC) has opened a consultation on access to court documents by non-parties. It invites feedback on proposed draft changes to CPR 5.4C covering the provision of documents from court records to non-parties. The consultation closes on 8 April 2024—see: LNB News 19/02/2024 28—CPRC launches consultation on access to court documents... Michelle Crotty appointed new Chief Executive of the Judicial Office The Courts and Tribunals Judiciary (CTJ) has confirmed the appointment of Michelle Crotty as Chief Executive of the Judicial Office. Currently Chief Capability Officer at the Serious Fraud Office, she...

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NEWS
Illegality defence no bar after insanity acquittal: Court of Appeal in Lewis-Ranwell v G4S Health Services clarifies distinction from diminished responsibility; negligence and Human Rights Act claims may proceed

Lewis-Ranwell v G4S Health Services (UK) Ltd and others [2024] EWCA Civ 138 What are the practical implications of this case? This decision is pertinent where: there has been a lapse in care delivered to a claimant with mental illness the claimant subsequently commits acts which, but for insanity, would amount to crimes the claimant is acquitted by reason of insanity In that setting, the judgment is significant: it confirms the illegality defence does not bar the claimant’s action. Such circumstances will be rare. In 2012 the Law Commission observed there were usually under 30 successful insanity pleas each year. Outside those facts, its impact is limited. It does not alter the law; rather, it is a definitive Court of Appeal application of the principles set out in Patel v Mirza [2016] UKSC 42 and later applied in Henderson v Dorset Healthcare University NHS Foundation Trust [2020] UKSC 43. What was the background? The claimant, amid a severe...

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View the related Practice Notes about Insanity

PRACTICE NOTES
Harassment and Stalking: Offences, Elements, Defences, Sentencing, Restraining Orders and Stalking Protection Orders under the Protection from Harassment Act 1997 (England and Wales)

The basic offences of harassment under section 1(1) and 1(1A) of the Protection from Harassment Act 1997 (PHA 1997) can only be tried summarily. For the aggravated offence, see Practice Note: Intentional harassment, alarm or distress. For guidance on civil remedies available to victims, see Practice Note: Applications under the Protection from Harassment Act 1997. The elements of the basic offences For an offence under PHA 1997, section 1(1), the prosecution must establish that the defendant: pursued a course of conduct that amounted to harassment of another person and knew, or ought to have known, that this conduct amounted to harassment of that person For an offence under PHA 1997, section 1(1A), the prosecution must establish that the defendant: pursued a course of conduct involving the harassment of two or more individuals and knew, or ought to have known, that the conduct involved harassment of those individuals; and intended by that conduct to persuade any person...

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PRACTICE NOTES
Sexual Harm Prevention Orders in England and Wales: Scope, Requirements, Duration, Procedure, Variation, Interim Orders, Breach and Appeals

Section 345 of the Sentencing Act 2020 (SA 2020) authorises the court to impose sexual harm prevention orders (SHPOs) when dealing with a defendant on conviction for specified categories of offences. The regime in sections 103A–103K of the Sexual Offences Act 2003 (SOA 2003) regulates SHPOs made other than on conviction, namely where: a court returns a verdict of not guilty of a specified sexual or violent offence by reason of insanity a court decides the defendant is under a disability and has carried out the act charged in relation to such an offence, or the police apply in respect of a qualifying offender who presents a risk to the public This Practice Note is principally concerned with SHPOs ordered as part of the sentencing exercise following conviction. For details on sexual risk orders (SROs), which do not form part of sentencing but may be pursued by complaint to a magistrates’ court against an individual believed to pose a risk of...

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PRACTICE NOTES
Insanity Defence under the M’Naghten Rules: elements, evidential burdens, and disposals in magistrates’ courts and the Crown Court (England and Wales)

What is the defence of insanity? Insanity operates as a defence to a criminal allegation. It is available in both the magistrates’ court and the Crown Court. At its core, the rationale for this defence is that criminal punishment ought to be imposed only on those who are responsible for their behaviour. The question of what amounts to insanity was the subject of debate until it was settled by the rule laid down in M’Naghten’s Case. In that case, Daniel M’Naghten shot and killed the secretary to the politician Sir Robert Peel, having intended to kill Sir Robert himself. He was prosecuted for murder, yet the verdict was an acquittal on the ground of insanity. High Court judges were then required to respond to questions in the House of Lords about the law that governs the insanity defence...

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