Thomas v Thomas established that consideration in contract law need not be adequate or equivalent in value to the promise, only that it must be sufficient and have some legal value. The case demonstrates that courts will not inquire into the adequacy of consideration provided it has some recognizable worth in law.

Case establishing that performance beyond contractual duty can constitute valid consideration if it involves substantially different obligations.

The Court of Appeal held that a father's promise to pay maintenance could be supported by consideration even where the mother had a legal duty to maintain the child.

Currie v Misa established the classical definition of consideration in English contract law. The case determined that consideration must consist of either a benefit to the promisor or a detriment to the promisee, providing the foundational test still used today.

A landmark contract law case establishing that performing existing contractual duties cannot constitute valid consideration for a new promise. When sailors demanded extra wages after some crew deserted, the court held their promise to continue their existing duties was unenforceable due to lack of consideration.

Merritt v Merritt established that agreements between spouses can be legally binding contracts when made after separation; the husband's argument that there was no consideration failed, since the wife's payment of the outstanding mortgage was ample consideration. The case distinguished between domestic arrangements made in harmony versus those made when the relationship has broken down, with the latter presumed to have legal intent.

Foakes v Beer established the rule that payment of a smaller sum cannot satisfy a debt of a larger sum, even if the creditor agrees to accept the lesser amount. This case affirmed the rule in Pinnel's Case that part payment of an existing debt is not good consideration, and confirmed the general rule that an accord without satisfaction is unenforceable.

The Court of Appeal held that Williams v Roffey does not apply to part payment of existing debts, where the rule in Pinnel's Case still governs.

Landmark case establishing the doctrine of total failure of consideration, allowing recovery of money paid under a frustrated contract where no benefit was received.

The House of Lords established that police providing services beyond their public duty can constitute valid consideration for a contract.

This landmark House of Lords case established the fundamental principle that only parties to a contract can sue on it, known as the doctrine of privity of contract. It also confirmed that consideration must move from the promisee for a contract to be enforceable.

Tweddle v Atkinson established the principle that only parties to a contract can enforce its terms. A son could not sue his deceased father-in-law's executor to enforce a promise made in a contract between his father and father-in-law, even though the contract was made for his benefit.

Hochster v De La Tour established the doctrine of anticipatory breach in contract law, allowing a claimant to sue immediately when the other party repudiates a contract before performance is due. This case created an important exception to the general rule that breach must occur before an action can be commenced.

A case establishing that tickets issued after payment cannot contain effective exclusion clauses unless reasonable notice is given before or at the time of contracting.

A leading case establishing that exclusion clauses displayed in hotel rooms cannot be incorporated into contracts made at reception, as notice comes too late.

Performing duty owed to third party constitutes valid consideration for new contracts.

Davis Contractors v Fareham UDC established the modern test for frustration of contract in English law. The House of Lords held that frustration occurs when performance becomes radically different from what was originally contemplated, rejecting both the 'implied term' and 'just and reasonable' theories.

House of Lords decision establishing that frustration requires the contractual adventure to become fundamentally different, not merely more expensive or inconvenient.

Beswick v Beswick established that a third party beneficiary of a contract cannot sue in their own right due to the doctrine of privity of contract, but may obtain the contractual benefit if they can sue in a representative capacity. The case confirmed the strict application of privity while demonstrating how it might be circumvented in appropriate circumstances.

Family arrangements presumed to lack contractual intention despite presence of consideration.

Performance of existing legal duty cannot constitute consideration for a new promise.

The Court of Appeal restored orthodoxy by holding that face-to-face contracts are presumed valid and only voidable for fraud, not void for mistake as to identity. This decision effectively overruled the approach in Ingram v Little.

Walton Stores negotiated a lease with Maher, who demolished an existing building and began constructing a new one in reliance on the expectation of a contract. Walton Stores allowed Maher to continue construction while negotiations stalled, then withdrew. The High Court of Australia held that promissory estoppel could operate as a cause of action where unconscionable conduct induced detrimental reliance.

A wife charged her interest in matrimonial property to secure her husband's business debts. The Court of Appeal held that to establish undue influence (actual or presumed), the transaction must be shown to be manifestly disadvantageous to the complainant. The court found actual undue influence by the husband but dismissed the claim because the transaction was not manifestly disadvantageous to the wife, so the bank could enforce the charge.

Court of Appeal decision limiting damages for mental distress in contract to cases involving physical inconvenience and discomfort, with awards to be modest.

Payment of lesser sum cannot discharge greater debt without fresh consideration.

Commercial agreements presumed to create legal relations despite 'ex gratia' descriptions.

Advertisement promising £100 reward constitutes binding contractual offer

Informal family arrangements can create binding contracts with sufficient evidence of intention.

Payment of lesser sum cannot discharge greater debt without fresh consideration.

Forbearance to sue can constitute consideration even if claim would fail

Cannot take benefit of deed without accepting corresponding burdens - mutual benefit and burden

Pre-contract reliance expenditure recoverable as alternative to expectation damages when foreseeable.

Entire contracts require complete performance before payment becomes due; no recovery for partial performance.

Contractual interpretation focuses on what reasonable person would understand, not linguistic technicalities

Court establishes objective test for contractual agreement over subjective intentions

Hypothetical bargain damages available where traditional loss-based damages inadequate.