Topic hub
Formation, terms, vitiating factors, remedies — the 47 landmark English contract decisions
Contract law answers a deceptively simple question: when does a promise become legally binding, and what happens when it is broken? It governs the everyday transactions of commercial and private life — from a consumer buying goods to a company entering a multi-million pound shipping agreement — by setting out the conditions under which the courts will hold parties to their word and award a remedy when things go wrong.
The subject is built on a handful of foundational doctrines that every student must master. Offer and acceptance tells you whether an agreement was actually reached; consideration explains why not every promise is enforceable; intention to create legal relations filters out domestic and social arrangements that the parties never meant to be binding; and the rules on terms — distinguishing conditions, warranties and innominate terms — determine the consequences when a contract is breached. Together these tests form the skeleton of the entire subject.
Beyond the basics, several areas remain genuinely contested and are worth close attention. The boundaries of consideration have been stretched by cases allowing practical benefit to suffice, raising questions about whether the doctrine still does any real work. Frustration and common mistake overlap in uncomfortable ways, leaving courts uncertain how far to go in releasing parties from bad bargains. Meanwhile, remedies for breach — particularly the tension between expectation loss, reliance loss and consumer surplus — continue to divide courts and academic opinion, and the Law Commission has periodically flagged the need for reform of third-party rights and unfair contract terms.
A contract requires a clear offer capable of acceptance and a matching, unconditional acceptance communicated to the offeror; a counter-offer destroys the original offer entirely. Adverts and displays of goods are generally invitations to treat, not offers.
Every simple contract requires consideration — something of value in the eyes of the law moving from the promisee — but it need not be adequate, only sufficient. Performance of an existing duty can amount to good consideration where it confers a practical benefit on the promisor.
The courts apply an objective test to decide whether the parties intended to create legal relations: domestic and social agreements are presumed not to be binding, while commercial agreements carry the opposite presumption. Either presumption can be rebutted on the facts.
A condition is so important that any breach entitles the innocent party to terminate and claim damages; breach of a warranty sounds only in damages. Innominate terms are assessed by the seriousness of the consequences of the breach, giving courts flexibility in commercial contracts.
The primary goal of contractual damages is to put the claimant in the position they would have been in had the contract been performed, subject to remoteness and a duty to mitigate. Courts will also protect consumer surplus and may award loss of amenity where a purely financial measure would leave the claimant under-compensated.
“Economic duress requires illegitimate pressure plus absence of practical alternative choices”
“No oral modification clauses are valid and enforceable in English law.”
“Textual analysis is primary in contract interpretation; commercial common sense provides secondary check.”
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“Terms can only be implied into contracts if necessary and so obvious as 'to go without saying'.”
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