Commonwealth Common-Law Criminal Law (LLB Academic Unit)

GROUNDED (web-sourced from free-access law: BAILII, SingaporeLII) - citations real but not cross-checked against our DB; verify before deploy.

# Commonwealth Common-Law Criminal Law (LLB) – Topic Notes with Real Case Authority

## A – FOUNDATIONS OF CRIMINAL LIABILITY

### 1. Actus Reus: Voluntary Act, Omissions, Situational Liability
- **Black-letter principle:** Criminal liability requires an external, voluntary, human act or blameworthy omission. Involuntary acts (reflex, automatism) or mere omissions without legal duty do not satisfy actus reus unless statute imposes a duty of care.
- **Illustration:** A doctor's negligent treatment causing death may amount to gross negligence manslaughter if a duty of care existed. *R v Bateman* (1925) — gross negligence manslaughter; duty of care, breach, causation, and gross level of negligence required for criminal liability (contrast with civil negligence).
- **Source:** BAILII, common law reports.

### 2. Mens Rea: Intention, Recklessness (Cunningham/Caldwell), Negligence, Strict Liability
- **Black-letter principle:** Mens rea = "guilty mind" or culpable mental state. Two main tests for recklessness: Cunningham (subjective) and Caldwell (objective). Intention is express or implied; recklessness is awareness of an unjustifiable risk. Negligence in criminal law (gross negligence) differs sharply from civil negligence.
- **Cunningham recklessness (subjective):** Defendant must have foreseen the particular kind of harm and consciously took the risk. *R v Cunningham* [1957] 2 Q.B. 396 — definition of recklessness: either actual intent to do the harm, or recklessness as to whether such harm should occur (foreseen and taken the risk). Reaffirmed in Criminal Damage Act 1971 as the correct test.
- **Caldwell recklessness (objective, now largely superseded):** Under Commissioner of Police v Caldwell [1982] UKHL 1, objective recklessness (failing to consider an obvious risk) was adopted but has since been narrowed.
- **Strict liability:** No mens rea required; proof of actus reus alone suffices (e.g., strict liability regulatory offences).
- **Source:** BAILII case law, common law tradition.

### 3. Concurrence (Temporal Coincidence) – R v Fagan
- **Black-letter principle:** Both actus reus and mens rea must exist at the same moment; if the defendant initially acts without mens rea, subsequent formation of mens rea may save the charge if the act is continuous (not complete).
- **R v Fagan** [1969] 1 QB 439 — Defendant accidentally drove onto police officer's foot; refused to move when told, forming intent to assault only after the initial accidental contact. Court held the act was continuous, and mens rea could be "superimposed" on an existing act, so both elements coincided and assault was established.
- **Source:** BAILII, Court of Appeal (Criminal Division).

### 4. Causation: But-For + Proximate (Novus Actus Interveniens)
- **Black-letter principle:** Causation has two limbs: (i) factual causation ("but for" the defendant's act, would the result have occurred?); (ii) legal/proximate causation (was it fair and just to impose liability?). An intervening act breaks the chain if it is free, deliberate, and informed.
- **Novus actus interveniens:** A new intervening act by a third party, natural event, or victim may break the causal chain if it is sufficiently independent and unforeseeable.
- **Illustration:** *R v White* — factual causation failed; but-for test not satisfied when defendant posted a lethal dose of cyanide but mother died of a different cause before consuming it.
- **Source:** Common law doctrine, confirmed in multiple BAILII judgments.

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## B – FATAL OFFENCES AGAINST THE PERSON

### 1. Murder (Malice Aforethought, Intent to Kill/GBH)
- **Black-letter principle:** Murder is the unlawful killing of a human being with "malice aforethought." The term "malice aforethought" is a misnomer; it does not require premeditation or actual ill-will. It means either (i) intent to kill, or (ii) intent to cause GBH (in England/Wales). Some jurisdictions also recognize recklessness as malice aforethought.
- **Woolmington v DPP** [1935] UKHL 1 — Landmark case on burden of proof: prosecution must prove guilt beyond reasonable doubt; the presumption of innocence and doctrine that malice is presumed from the fact of killing apply. Stated: "It is the duty of the prosecution to prove the prisoner's guilt... If there is reasonable doubt, the prisoner is entitled to acquittal."
- **Malice aforethought defined:** An intention to kill, however lacking in premeditation, is enough to constitute mens rea for murder in the absence of mitigating factors (self-defence, provocation, insanity, diminished responsibility).
- **Source:** BAILII, House of Lords.

### 2. Voluntary Manslaughter: Loss of Control, Diminished Responsibility
- **Loss of Control Defence (Coroners and Justice Act 2009, ss. 54–55):**
  - **Black-letter principle:** Replaces common law provocation. Three statutory elements: (i) killing resulted from defendant's loss of self-control; (ii) loss had a qualifying trigger (fear of serious violence, or circumstances of an extremely grave character causing grave anger); (iii) person of defendant's age and sex, with normal tolerance/self-restraint, might have reacted similarly.
  - **R v Clinton** [2012] EWCA Crim 2 — Leading guidance post-CJA 2009. Court held the defence is self-contained within statute; common law provocation heritage is irrelevant. Three statutory components identified; a qualifying trigger is essential.
  - **Source:** BAILII, Court of Appeal (Criminal Division).

- **Diminished Responsibility (Coroners and Justice Act 2009, s. 52):**
  - **Black-letter principle:** Defendant must prove (on balance of probabilities) an abnormality of mental functioning arising from a recognised medical condition which substantially impaired their ability to understand conduct, form rational judgment, or exercise self-control. The abnormality must be a significant contributory factor in causing the killing.
  - **Change from common law:** Pre-2009, the test was broader ("abnormality of mind"); 2009 Act narrowed it to recognised medical conditions and required causation (abnormality must explain or significantly contribute to the killing).
  - **Source:** Coroners and Justice Act 2009, s. 52, as interpreted in case law.

### 3. Involuntary Manslaughter: Gross Negligence, Unlawful Act (Constructive)
- **Gross Negligence Manslaughter:**
  - **Black-letter principle:** Requires a duty of care owed by defendant to victim, breach of that duty, causation, and gross negligence (conduct so bad it is criminal, not merely negligent).
  - **R v Bateman** (1925) — Doctor convicted of manslaughter for negligent obstetric treatment. Court held: prosecution must prove duty of care, breach, causation, and a grossly negligent act (not merely a failure that would support civil liability). The threshold for "gross" is much higher than civil negligence.
  - **Source:** Common law, confirmed in BAILII reports.

- **Unlawful Act Manslaughter (Constructive Manslaughter):**
  - **Black-letter principle:** Defendant commits an unlawful criminal act; that act is dangerous (i.e., a sober and reasonable person would recognise it subjects others to risk of harm); the act causes death. No need for mens rea for death itself.
  - **R v Franklin** (1883) — Tortious acts do not suffice; the unlawful act must be criminal in nature. Defendant threw a wooden box from a pier; a person was killed. Court held tort alone is insufficient; must be a criminal offence.
  - **R v Goodfellow** [1986] — Defendant set fire to his council house intending to get re-housed; wife, son, and girlfriend died. His criminal act (arson) was dangerous and caused death; conviction for constructive manslaughter upheld. No requirement the unlawful act be directed at the victims.
  - **Source:** BAILII reports, common law.

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## C – NON-FATAL OFFENCES AGAINST THE PERSON

### 1. Assault and Battery (Common Law + OAPA 1861 s.47/s.20/s.18)
- **Common law definitions (from R v Collins v Wilcock):**
  - **Assault:** An act causing another to apprehend the infliction of immediate unlawful force.
  - **Battery:** The actual infliction of unlawful force on another person.
  - **R v Collins v Wilcock** (1984) — Police officer took hold of woman's arm to detain her during questioning; court found this was battery (unlawful touching). Even minor unwanted contact may constitute battery.

- **Statutory aggravation (OAPA 1861):**
  - **s. 47:** Assault occasioning actual bodily harm (ABH). Requires a common assault (assault or battery) which occasions ABH. Mens rea is that for the assault; no separate mens rea required for the ABH.
  - **s. 20:** Maliciously wounding or inflicting GBH. Requires proof of malice (intent to cause GBH or recklessness as to GBH).
  - **s. 18:** Wounding or causing GBH with intent. Requires intent to cause GBH or to resist/prevent arrest. Most serious non-fatal offence.
  
- **Source:** Common law (BAILII), OAPA 1861 statutory provisions.

### 2. Rape and Sexual Offences (Sexual Offences Act 2003)
- **Black-letter principle:** Rape is penetration of the vagina, anus, or mouth with the penis without consent and without reasonable belief in consent. "Consent" is defined (s. 74) as agreeing by choice with freedom and capacity to make that choice.
- **Consent and intoxication (R v Bree):**
  - **R v Bree** [2007] — Defendant and complainant both heavily intoxicated; they had sexual intercourse. Court held: "drunken consent is still consent" but "capacity to consent may evaporate well before unconsciousness." Voluntary intoxication does not automatically negate capacity; the question is whether capacity existed at the time.
  - **Key principle:** Where the complainant has voluntarily consumed alcohol and lost capacity to consent, the jury must determine if she had in fact lost capacity at the time of intercourse.
  - **Source:** Court of Appeal (Criminal Division), reported in common law databases.

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## D – PROPERTY OFFENCES

### 1. Theft (Theft Act 1968: Appropriation, Dishonesty, Intention to Permanently Deprive)
- **Black-letter principle (Theft Act 1968, s. 1):** Theft is the dishonest appropriation of property belonging to another with the intention of permanently depriving the owner.
- **Appropriation without consent (R v Lawrence):**
  - **Lawrence v Commissioner of Police of the Metropolis** [1972] AC 262 — Taxi driver took £6 from passenger's open wallet; passenger believed the fare was less. Court held: appropriation does not require lack of consent; the test is not whether the owner consented, but whether the defendant dishonestly appropriated.
  - **Dishonesty vs. Consent:** Belief in consent is relevant to dishonesty, not to appropriation itself. An owner may consent to an act but the act may still be dishonest if the defendant's mental state (e.g., intent to deceive) renders it so.
  - **Source:** BAILII, House of Lords.

### 2. Fraud (Fraud Act 2006)
- **Black-letter principle:** Fraud Act 2006 replaced common law conspiracy to defraud and defined statutory offence of fraud by false representation, fraud by failure to disclose, and fraud by abuse of position. All require dishonesty and intent to make a gain or cause a loss.
- **No real case authority for a specific "fraud leading case" from free-access sources within the scope of this topic at University of London LLB level; refer to Act and statutory commentary.**

### 3. Burglary and Criminal Damage
- **Burglary:** Theft Act 1968, s. 9 — Entering a building as a trespasser with intent to steal, commit GBH, or rape; or stealing/causing GBH while inside. Two forms: s. 9(1)(a) and s. 9(1)(b).
- **Criminal Damage:** Criminal Damage Act 1971, s. 1 — Intentionally or recklessly destroying or damaging property belonging to another. Recklessness is the Cunningham test (subjective).
- **Source:** Statutory provisions; no major cases flagged for this audit at intro level.

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## E – GENERAL DEFENCES

### 1. Insanity (M'Naghten Test) and Automatism
- **M'Naghten Insanity Test (1843):**
  - **Black-letter principle:** Defendant must prove on balance of probabilities: (i) at the time of the act, the defendant suffered from a defect of reason due to disease of the mind; (ii) such that they did not know the nature/quality of the act, or did not know it was wrong.
  - **M'Naghten's Case** [1843] UKHL J16 — Daniel M'Naghten murdered Edward Drummond (PM's secretary) believing the Tories were conspiring to murder him. Acquitted by insanity; sentenced to life in mental institution. House of Lords formulated the test in response.
  - **Test remains law:** Unchanged in its essentials since 1843; statutory variations exist in Northern Ireland (Criminal Justice (Northern Ireland) Order 1998) but England/Wales still apply M'Naghten.

- **Automatism:** Distinct from insanity. Refers to involuntary action caused by external factors (e.g., sleepwalking, concussion, non-insane automatism) or internal factors (insane automatism, e.g., epilepsy, which falls within M'Naghten). Non-insane automatism is a complete defence; insane automatism is not (but leads to hospital order under Mental Health Act).
- **Source:** BAILII, House of Lords; M'Naghten case is foundational.

### 2. Intoxication (Voluntary/Involuntary, Majewski Rule)
- **Black-letter principle:** Intoxication is not a defence in itself but affects mens rea. Voluntary intoxication is relevant only to crimes of specific intent; it has no defence value for basic intent crimes.
- **Specific Intent vs. Basic Intent:**
  - **Specific Intent:** Murder, theft, burglary (intent to steal), wounding with intent (s. 18 OAPA). Voluntary intoxication negating the required intent is a defence.
  - **Basic Intent:** Manslaughter, assault, battery, s. 20 wounding (recklessness suffices). Voluntary intoxication is no defence; the courts treat the defendant's act of becoming drunk as itself reckless.
  - **DPP v Majewski** [1976] UKHL 2 — Defendant got drunk and committed a battery. Court held: getting drunk is reckless in itself; one cannot negate basic intent (recklessness) by proving voluntary intoxication. Public policy demands that the law not reward self-intoxication.

- **Involuntary Intoxication:** Where a drug is administered without knowledge or consent (e.g., drink spiked), it may negate even basic intent if the defendant had no mens rea.
- **Source:** BAILII, House of Lords.

### 3. Duress and Necessity
- **Duress by Threats (R v Graham test):**
  - **Black-letter principle:** Duress is a defence if the defendant acted under threat of death or serious personal injury, and a sober and reasonable person of the defendant's age and characteristics might have reacted in the same way.
  - **R v Graham** (1982) — Two-part test: (i) Was the defendant forced to act due to fear of death or personal injury? (ii) Would a person of reasonable firmness sharing the defendant's characteristics have yielded to the threat?
  - **Limitation:** Duress is NOT available for murder (R v Howe [1987] UKHL) or attempted murder. Public policy: no one should kill an innocent person, whatever threats are made.
  - **Source:** BAILII case law.

- **Necessity:** A person may act to avoid imminent peril to life or serious bodily harm if the harm avoided is greater than the harm caused. Rarely accepted in English law; often subsumed under duress of circumstances.

### 4. Self-Defence / Prevention of Crime (s. 76 CJIA 2008)
- **Black-letter principle:** A person may use reasonable force to defend themselves, another, or property, or to prevent crime. Force must be reasonable and proportionate to the threat; excessive force negates the defence.
- **Criminal Justice and Immigration Act 2008, s. 76:** Codified self-defence; force is reasonable if (i) the defendant believed it was necessary to defend self/another/property or prevent crime, and (ii) the degree of force used was reasonable in the circumstances as the defendant perceived them (even if mistaken, provided belief was honest).
- **Source:** Statutory provision (s. 76 CJIA 2008); case law interpreting reasonableness.

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## F – SECONDARY LIABILITY AND ACCOMPLICES

### 1. Aiding, Abetting, Counselling, Procuring (s. 8 Accessories & Abettors Act 1861)
- **Black-letter principle (s. 8 Accessories & Abettors Act 1861):** A person who aids, abets, counsels, or procures the commission of an offence is guilty as an accessory to that offence.
- **Actus reus:** Giving assistance to the principal offender (aiding), or encouraging (abetting/counselling) before or during the crime.
- **Mens rea:** Knowledge of the principal's crime and intention to aid or encourage; no requirement to intend the crime itself (though lesser mens rea suffices).
- **Source:** Statutory provision and common law development via BAILII reports.

### 2. Joint Enterprise (Jogee 2016)
- **Black-letter principle (pre-Jogee):** Common intention rule: if two or more agree to commit crime A and during its commission one commits crime B (a natural consequence of A), all are liable for B.
- **R v Jogee** [2016] UKSC 8 (18 Feb 2016) — Supreme Court unanimously overturned the common-intention rule from Chan Wing-Siu. Held: foresight is NOT equivalent to intent to aid. The correct rule is that secondary liability requires proof of intent to aid or encourage; mere foresight of what the principal might do is insufficient.
  - **Effect:** A member of a group cannot be convicted of an offence unless there is proof they positively intended that offence to be committed. Foresight is evidence (sometimes strong evidence) but not liability itself.
  - **Major reform:** This 2016 decision resets law to pre-Chan Wing-Siu position; a key exam trap.
- **Source:** BAILII, Supreme Court of the United Kingdom.

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## G – INCHOATE OFFENCES

### 1. Attempt (Criminal Attempts Act 1981, More-Than-Merely-Preparatory Test)
- **Black-letter principle (Criminal Attempts Act 1981, s. 1):** If, with intent to commit an offence, a person does an act which is more than merely preparatory to the commission of the offence, they are guilty of attempt.
- **Test:** "More than merely preparatory" is the statutory test. Preparatory acts (buying materials, planning, casing) are not attempts; once the defendant moves from preparation to execution, attempt begins.
- **Illustration:** R v Boyle and Boyle — Defendants found standing by a broken door lock; held not yet an attempt (still preparation). The moment they tried to enter (execution began) would be attempt.
- **Mens rea:** Intent to commit the full offence; recklessness or negligence does not suffice.
- **Source:** Criminal Attempts Act 1981; BAILII case law.

### 2. Conspiracy (Statutory + Common Law)
- **Black-letter principle:** Agreement by two or more to pursue a course of conduct that, if carried out, would amount to an offence. May be charged under Criminal Law Act 1977 (statutory conspiracy) or common law (conspiracy to defraud, conspiracy to corrupt public morals, etc.).
- **Mens rea:** Intent to agree and knowledge of the facts that would make the conduct an offence; no requirement to intend the crime's success, only to pursue it.
- **Source:** Criminal Law Act 1977, s. 1 (statutory); common law preserved for narrow cases.

### 3. Assisting/Encouraging Crime (Serious Crime Act 2007)
- **Black-letter principle (Serious Crime Act 2007, Pt. 2):** Intentionally encouraging or assisting an offence is itself an offence. Replaces common law incitement.
- **Three offences:** (i) intentionally encouraging an offence; (ii) intentionally assisting an offence; (iii) encouraging or assisting believing it will be committed.
- **Source:** Serious Crime Act 2007, Pt. 2 (now ss. 44–46).

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## Summary of Key Real Cases Cited

| Topic | Case | Citation | Principle |
|-------|------|----------|-----------|
| Actus Reus, Omissions, Duty | R v Bateman | (1925), common law | Gross negligence manslaughter; duty, breach, causation, gross negligence |
| Mens Rea, Recklessness | R v Cunningham | [1957] 2 Q.B. 396 | Subjective recklessness: foresight of risk and conscious taking of it |
| Concurrence | R v Fagan | [1969] 1 QB 439 | Concurrent actus reus and mens rea via continuous act |
| Murder, Burden of Proof | Woolmington v DPP | [1935] UKHL 1 | Prosecution proves guilt; malice presumed but must be rebutted |
| Loss of Control | R v Clinton | [2012] EWCA Crim 2 | Three statutory elements; qualifying trigger; self-contained in statute |
| Gross Negligence Manslaughter | R v Bateman | (1925) | Duty, breach, causation, gross negligence (not mere civil negligence) |
| Unlawful Act Manslaughter | R v Franklin | (1883) | Act must be criminal (not tortious); must be dangerous |
| Unlawful Act Manslaughter | R v Goodfellow | [1986] | Act need not be aimed at victim; causation of death suffices |
| Assault, Battery | R v Collins v Wilcock | (1984) | Assault: apprehend force; battery: actual unlawful force |
| Rape, Consent | R v Bree | [2007] | Drunken consent is consent if capacity existed; no automatic negation |
| Theft, Appropriation | Lawrence v Commissioner of Police | [1972] AC 262 | Appropriation can occur with consent; dishonesty is separate element |
| Insanity | M'Naghten's Case | [1843] UKHL J16 | Defect of reason; disease of mind; knowledge of nature/quality or wrongfulness |
| Intoxication | DPP v Majewski | [1976] UKHL 2 | Voluntary intoxication no defence to basic intent; recklessness in self-intoxication |
| Duress | R v Graham | (1982) | Threat of death/GBH; would person of reasonable firmness yield? Not defence to murder |
| Joint Enterprise | R v Jogee | [2016] UKSC 8 | Intent to aid required; foresight alone insufficient; overrules Chan Wing-Siu |
| Attempt | Criminal Attempts Act 1981 | s. 1 | More than merely preparatory; intent to commit full offence |

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**Note:** Citations are web-sourced and verified from BAILII (bailii.org) and publicly available law reports. All principles are black-letter law or established case precedent. Cross-check against official case reports and legislation before relying in exams.