Pakistan International Airline Corp v Times Travel (UK) Ltd [2021] UKSC 40

Times Travel was a small travel agency whose business depended heavily on selling tickets for Pakistan International Airlines Corporation, then the only airline operating direct flights between the United Kingdom and Pakistan. A dispute arose over commissions that Times Travel said PIA had not paid. PIA lawfully terminated the existing agency agreement and sharply reduced Times Travel's ticket allocation. It offered a new agreement containing a waiver of the agency's earlier commission claims. Times Travel signed because it faced serious commercial difficulty without access to tickets, but later sought to recover the waived sums on the ground of economic duress. The trial judge found that PIA genuinely believed it was not liable for the disputed commission.

Can a contract be set aside for economic duress where the defendant uses lawful contractual powers to obtain a waiver, and what makes such commercial pressure legally illegitimate?

The Supreme Court unanimously held that Times Travel had not established economic duress and allowed PIA's appeal. The majority accepted that lawful-act economic duress exists in English law but confined it to exceptional circumstances. PIA was entitled to terminate the old arrangement and alter ticket allocations. Crucially, it genuinely believed that the disputed commission was not due, so its demand did not involve a bad-faith attempt to force surrender of a claim it knew to be valid. Times Travel's lack of a practical alternative and PIA's strong bargaining position were insufficient by themselves. Lord Burrows agreed with the outcome but favoured a formulation focusing more directly on a bad-faith demand supported by a lawful threat. On either approach, the required illegitimate pressure was absent.

Economic duress requires illegitimate pressure that causes a party to enter the transaction when it has no reasonable practical alternative. A threat to do something lawful can qualify only exceptionally. Commercial leverage, unequal bargaining power and a hard lawful demand do not alone make an agreement voidable, particularly where the demand is made in good faith.

The case is the leading modern authority on lawful-act economic duress. It preserves the doctrine while emphasising contractual certainty and the legitimate use of commercial bargaining power. Students should distinguish it from unlawful threats, as in Barton v Armstrong, and from cases such as Atlas Express v Kafco, where threatened breach was used against a vulnerable party. The judgments differ in their preferred explanation of the exceptional lawful-act category, but all members of the court agreed that PIA's genuine belief about the commission claim prevented relief on these facts.