decision in Williams v Roffey Brothers and Nicholls (Contractors) Ltd [1991] 1 QB 1, made the doctrine of economic duress vitally important in preventing extortion or improper threats in English Contract Law? The general rule in English contract law is freedom of contract, namely that any agreements entered into by parties of full age and capacity, if intended to be legally binding and if supported by consideration, will be treated as legally enforceable by the courts. The English law has, however