Patel v Mirza [2016] UKSC 42

Mr Patel paid £620,000 to Mr Mirza for betting on RBS shares using insider information. The scheme failed and Mr Mirza refused to repay. The Supreme Court allowed recovery in unjust enrichment, fundamentally reshaping the illegality doctrine by replacing the rigid reliance test with a flexible public policy approach.

Facts

Mr Patel transferred sums totalling £620,000 to Mr Mirza for the purpose of betting on the price of RBS shares using advance insider information which Mr Mirza expected to obtain from RBS contacts regarding an anticipated government announcement. The expected announcement did not materialise, the intended betting did not take place, and Mr Mirza failed to repay the money despite promises to do so. The agreement between the parties amounted to a conspiracy to commit insider dealing contrary to section 52 of the Criminal Justice Act 1993. Mr Patel brought claims on various bases including contract and unjust enrichment.

Issues

The principal issue was whether the doctrine of illegality (ex turpi causa non oritur actio) precluded Mr Patel from recovering moneys paid under a contract tainted by illegality where the illegal purpose had not been carried out. This required the Court to consider whether the ‘reliance principle’ established in Tinsley v Milligan [1994] 1 AC 340 should continue to govern such claims, or whether a different approach grounded in public policy should be adopted.

Arguments

Appellant (Mr Mirza)

Mr Mirza argued that Lord Mansfield’s maxim in Holman v Johnson applied equally to claims in unjust enrichment as to contractual claims, and that the court must give no assistance to a party who had engaged in any form of illegality. He submitted that Mohamed v Alaga & Co was either confined to its peculiar facts or wrongly decided, and that Mr Patel could not bring himself within the locus poenitentiae exception because he had not voluntarily withdrawn from the illegal scheme.

Respondent (Mr Patel)

Mr Patel argued that the strict application of the reliance test would not advance the public policy underlying Lord Mansfield’s maxim. He contended that he was seeking to unwind the arrangement, not to profit from it, and that allowing recovery would not undermine the purpose of the rule against insider dealing since no insider dealing had actually occurred.

Judgment

The Supreme Court unanimously dismissed the appeal, holding that Mr Patel was entitled to recover the £620,000. However, the Court was divided in its reasoning, with the majority (Lord Toulson, with whom Lady Hale, Lord Kerr, Lord Wilson and Lord Hodge agreed) adopting a new flexible ‘range of factors’ approach, while Lord Mance, Lord Clarke, Lord Sumption and Lord Neuberger preferred a more rule-based analysis.

The Majority Approach (Lord Toulson)

Lord Toulson held that the reliance rule in Tinsley v Milligan should no longer be followed. He concluded that the essential rationale of the illegality doctrine is that it would be contrary to the public interest to enforce a claim if to do so would be harmful to the integrity of the legal system. The court must consider three matters: (a) the underlying purpose of the prohibition transgressed and whether that purpose would be enhanced by denial of the claim; (b) any other relevant public policy on which denial would have an impact; and (c) whether denial would be a proportionate response to the illegality.

‘one cannot judge whether allowing a claim which is in some way tainted by illegality would be contrary to the public interest, because it would be harmful to the integrity of the legal system, without a) considering the underlying purpose of the prohibition which has been transgressed, b) considering conversely any other relevant public policies which may be rendered ineffective or less effective by denial of the claim, and c) keeping in mind the possibility of overkill unless the law is applied with a due sense of proportionality.’

Lord Toulson endorsed Gloster LJ’s reasoning in the Court of Appeal, holding that the policy underlying the statutory provisions on insider dealing would not be stultified by allowing Mr Patel’s claim. Mr Patel was seeking to unwind the arrangement, not to profit from it.

The Minority Reasoning

Lord Sumption (with whom Lord Clarke agreed) and Lord Mance strongly disagreed with the ‘range of factors’ approach, considering it would introduce unacceptable uncertainty and convert a legal principle into judicial discretion. They preferred a rule-based approach focused on consistency and the integrity of the legal system, drawing heavily on McLachlin J’s judgment in the Canadian case Hall v Hebert [1993] 2 SCR 159. They held that restitution should be available where the parties can be restored to the position they should always have been in, because such an order does not give effect to the illegal transaction but unwinds it.

Lord Neuberger formulated ‘the Rule’: a claimant is generally entitled to the return of money paid pursuant to a contract to carry out an illegal activity where the activity is not proceeded with. He considered this consistent with authorities going back to Smith v Bromley (1760) and Walker v Chapman (1773).

Common Ground

All members of the Court agreed that Mr Patel was entitled to recover his £620,000. The reliance test from Tinsley v Milligan was rejected by the entire Court (though with differing alternatives proposed). The notion of locus poenitentiae requiring voluntary withdrawal or penitence was rejected.

Implications

The New Framework

The majority judgment establishes a new framework for the illegality doctrine in English law. Courts are no longer to apply a rigid reliance test but must instead engage in a structured assessment of public policy considerations, asking whether denial of the claim would serve the integrity of the legal system, taking into account the purpose of the prohibition, countervailing public policies, and proportionality.

Overruling of Prior Authority

The reliance principle as applied in Tinsley v Milligan [1994] 1 AC 340 and Bowmakers v Barnet Instruments [1945] KB 65 should no longer be followed. Parkinson v College of Ambulance [1925] 2 KB 1 was effectively overruled by Lord Neuberger. The correctness of Mohamed v Alaga & Co was affirmed.

Unjust Enrichment Claims

A claimant who satisfies the ordinary requirements of a claim in unjust enrichment will not prima facie be debarred from recovering money paid by reason only that the consideration which has failed was an unlawful consideration. Rare cases may arise where particular reasons (such as a contract for murder) may justify refusing assistance.

Practical Significance

The decision affects practitioners across contract, tort, property and unjust enrichment law. It introduces greater flexibility but, as the minority warned, may also introduce uncertainty as judges weigh multiple factors. The decision settles a long-standing schism in this area and addresses concerns raised by the Law Commission’s reports of 1999, 2009 and 2010.

Limits and Unresolved Points

The minority’s concerns about uncertainty represent an important caveat: the application of the new test in future cases will require careful development. The relationship between the new approach and the Proceeds of Crime Act 2002 was touched on but not fully resolved. The application of the principle to claims to enforce (rather than unwind) contracts remains a developing area, as does its application to quantum meruit claims for services rendered under illegal contracts.

Wider Importance

This case is of fundamental importance because it represents a significant restatement of an area of law described by Gloster LJ as one where ‘it is almost impossible to ascertain or articulate principled rules from the authorities’. By moving from a rule-based to a policy-based approach, the Supreme Court has sought to bring transparency and proportionality to an area marked by complexity, arbitrariness and inconsistency over more than two centuries since Lord Mansfield’s statement in Holman v Johnson.

Verdict: Appeal dismissed. Mr Patel was entitled to recover the £620,000 paid to Mr Mirza in unjust enrichment, the Court of Appeal’s order being upheld.

Source: Patel v Mirza [2016] UKSC 42