English contract law is the body of law that regulates legally binding agreements in England and Wales. With its roots in the lex mercatoria and the activism of the judiciary during the Industrial Revolution, it shares a heritage with countries across the Commonwealth (such as Australia, Canada, India). English contract law also draws influence from European Union law, from the United Kingdom's continuing membership in Unidroit and, to a lesser extent, from the United States. A contract is a voluntary obligation, or set of voluntary obligations, which is enforceable by a court or tribunal. This contrasts with other areas of private law in which obligations arise as an operation of the law. For example, the law imposes a duty on individuals not to unlawfully constrain another's freedom of movement (false imprisonment) in the law of tort and the law says a person cannot hold property mistakenly transferred in the law of unjust enrichment. English law places great importance on making sure that individuals genuinely consent to the agreements that can be enforced in court, as long as those agreements comply with statutory requirements and Human Rights. Generally, a contract is formed when one person makes an offer, and another person accepts it by communicating their assent or performing the offer's terms. If the terms are certain, and the parties can be presumed from their behaviour to have intended that the terms are binding, generally the agreement is enforceable. Some contracts, particularly for large transactions such as a sale of land, also require the formalities of signatures and witnesses and English law goes further than other European countries by requiring all parties bring something of value, known as "consideration", to a bargain as a precondition to enforce it. Contracts can be made personally or through an agent acting on behalf of a principal, if the agent acts within what a reasonable person would think they have the authority to do. In principle, English law grants people broad freedom to agree the content of a deal. Terms in an agreement are incorporated through express promises, by reference to other terms or potentially through a course of dealing between two parties. Those terms are interpreted by the courts to seek out the true intention of the parties, from the perspective of an objective observer, in the context of their bargaining environment. Where there is a gap, courts typically imply terms to fill the spaces, but also through the 20th century both the judiciary and legislature have intervened more and more to strike out surprising and unfair terms, particularly in favour of consumers, employees or tenants with weaker bargaining power. Contract law works best when an agreement is performed, and recourse to the courts is never needed because each party knows their rights and duties. However, where an unforeseen event renders an agreement very hard, or even impossible to perform, the courts typically will construe the parties to want to have released themselves from their obligations. It may also be that one party simply breaches a contract's terms. If a contract is not substantially performed, then the innocent party is entitled to cease their own performance and sue for damages to put them in the position as if the contract were performed. They are under a duty to mitigate their own losses and cannot claim for harm that was a remote consequence of the contractual breach, but remedies in English law are footed on the principle that full compensation for all losses, pecuniary or not, should be made good. In exceptional circumstances, the law goes further to require a wrongdoer to make restitution for their gains from breaching a contract, and may demand specific performance of the agreement rather than monetary compensation. It is also possible that a contract becomes voidable, because, depending on the specific type of contract, one party failed to make adequate disclosure or they made misrepresentations during negotiations. Unconscionable agreements can be escaped where a person was under duress or undue influence or their vulnerability was being exploited when they ostensibly agreed to a deal. Children, mentally incapacitated people, and companies whose representatives are acting wholly outside their authority, are protected against having agreements enforced against them where they lacked the real capacity to make a decision to enter an agreement. Some transactions are considered illegal, and are not enforced by courts because of a statute or on grounds of public policy. In theory, English law attempts to adhere to a principle that people should only be bound when they have given their informed and true consent to a contract. Source: Wikipedia (en)