“The objection, that a contract is immoral or illegal as between plaintiff and defendant, sounds at all times very ill in the mouth of the defendant. It is not for his sake, however, that the objection is ever allowed; but it is founded in general principles of policy, which the defendant has the advantage of, contrary to the real justice, as between him and the plaintiff, by accident, if I may so say. The principle of public policy is this; ex dolo malo non oritur actio. No court will lend its aid to a man who founds his cause of action upon an immoral or an illegal act. If, from the plaintiff's own stating or otherwise, the cause of action appears to arise ex turpi causa, or the transgression of a positive law of this country, there the court says he has no right to be assisted. It is upon that ground the court goes; not for the sake of the defendant, but because they will not lend their aid to such a plaintiff. So if the plaintiff and defendant were to change sides, and the defendant was to bring his action against the plaintiff, the latter would then have the advantage of it; for where both are equally in fault, potior est conditio defendentis. The question therefore is, “Whether, in this case, the plaintiff's demand is founded upon the ground of any immoral act or contract, or upon the ground of his being guilty of any thing which is prohibited by a positive law of this country.”
“In a case where the plaintiff is not seeking to enforce an unlawful contract but founds his case on collateral rights acquired under the contract (such as a right of property) the court is neither bound nor entitled to reject the claim unless the illegality of necessity forms part of the plaintiff’s case.”
“A strict application of Tinsley v Milligan across all forms of tort action would limit the applicability of the defence to those (probably comparatively rare) situations in which the claimant has to rely (however that term is interpreted) on the illegality as part of his claim.”
“I do not believe that there is any general principle that the claimant must either plead, give evidence of or rely on his own illegality for the principle to apply. Such a technical approach is entirely absent from Lord Mansfield’s exposition of the principle. I would however accept that for the principle to operate the claim made by the claimant must arise out of criminal or illegal conduct on his part. In this context “arise out of” clearly denotes a causal connection with the conduct a view which is implicit in such different cases as Lane v Holloway and the recent case to which we were referred in this court, Standard Chartered Bank v Pakistan National Shipping Corporation… In my view the principle applies when the claimant’s claim is so closely connected or inextricably bound up with his own criminal or illegal conduct that the court could not permit him to recover without appearing to condone that conduct.”
“From these authorities I derive the following propositions: 1. The operation of the principle arises where the claimant's claim is founded upon his own criminal or immoral act. The facts which give rise to the claim must be inextricably linked with the criminal activity. It is not sufficient if the criminal activity merely gives occasion for tortious conduct of the Defendant.”
“In the premises: at all material times, and in particular on18 August 2001 , the Claimant was suffering from a mental illness that was caused and/or materially contributed to by the accident, namely severe post-traumatic stress disorder and/or associated depressive symptoms, and the symptoms of the said mental illness were exacerbated by two further traumatic incidents experienced while travelling on trains in 2000. By the latest13 August 2001 , when the Claimant failed to return to work after sick leave, he was unable to travel to work and/or was incapable of work. The Claimant killed Mr Boultwood on18 August 2001 . It is the Claimant’s case that: At the time of the killing, the Claimant was suffering from a mental illness that had been caused by the said accident. On the evening of18 August 2001 , the said mental illness inter alia: predisposed the Claimant to act with violence when his car was attacked by Mr Boultwood; impaired substantially the Claimant’s capacity to make a rational judgement when responding to the intense feelings of anger triggered by Mr Boultwood’s attack; led him to experience a highly abnormal emotional reaction to the situation in which he found himself, which affected his ability to decide how to react; narrowed his judgment to such a degree that stabbing Mr Boultwood appeared to be the only option available to him at the time, regardless of the consequences of his actions; In the premises, it is the Claimant’s case that he would not have killed Mr Boultwood but for the mental illness caused by the said accident.”
“In the present case the plaintiff has been convicted of a serious criminal offence. In such a case public policy would in our judgment preclude the court from entertaining the plaintiff’s claim unless it could be said that he did not know the nature and quality of his act or that what he was doing was wrong. The offence of murder was reduced to one of manslaughter by reason of the plaintiff’s mental disorder but his mental state did not justify a verdict of not guilty by reason of insanity. Consequently, though his responsibility for killing Mr Zito is diminished, he must be taken to have known what he was doing and that it was wrong. A plea of diminished responsibility accepts that the accused’s mental responsibility is substantially impaired but it does not remove liability for his criminal act. We do not consider that in such a case a court can or should go behind the conviction and, even if it could, we do not see in the medical report attached to the statement of claim any statement which would justify the court taking the view that this plaintiff had no responsibility for the serious crime to which he pleaded guilty. The plaintiff in this case, though his responsibility is in law reduced, must in Best C.J.’s words be presumed to have known that he was doing an unlawful act.”
“In my view that part of the statement of claim upon which the plaintiff relied to establish the vast majority of his loss was founded upon his commission of serious criminal offences for which he was fully responsible in law. The principle that the court will not lend its aid to the recovery of damages based upon criminal offences applies and the case is indistinguishable save in immaterial respects from Clunis. The plaintiff’s responsibility in this case was undiminished in any respect and I consider it would be contrary to public policy to allow him to recover damages consequent upon the commission of those offences.”
“It would be inconsistent with his criminal conviction to attribute to the negligent defendant in this action any legal responsibility for the financial consequences of crimes which he has been found guilty of having deliberately committed.”
“the particular head of damage which the plaintiff has pleaded in the struck out parts of the pleading relates to loss suffered by him as a direct result of crimes committed by him against others, not as a direct or foreseeable result of a breach of a duty of care owed to him by the defendant.”
“If the plaintiff has been convicted and sentenced for a crime, it means that the criminal law has taken him to be responsible for his actions, and has imposed an appropriate penalty. He or she should therefore bear the consequences of the punishment, both direct and indirect. If the law of negligence were to say, in effect, that the offender was not responsible for his actions and should be compensated by the tortfeasor, it would set the determination of the criminal court at nought. It would generate the sort of clash between civil and criminal law that is apt to bring the law into disrepute. Hence, the application of the simple ‘but for’ test to determine causation would be singularly inappropriate in this case. In all the circumstances, it would be quite unreal to find that the appellant caused the respondent to engage in criminal conduct… If one cannot get ‘direct’ compensation for the non-economic or economic loss resulting from imprisonment, one should not be able to receive ‘indirect’ compensation for lost earning capacity after imprisonment by treating the fact of imprisonment as irrelevant to the assessment of economic loss.”
“Notwithstanding anything said by this Court in Clunis an argument may survive that damages are recoverable in respect of tortious acts that have resulted in a law-abiding citizen becoming a criminal.”