: Kafko ltd secured a contract with a company, agreeing to provide them with a specified quantity of food, weekly. Kafko then entered into a contract with Atlas Express, a trasnport company, whereby the goods would be collected at an agreed time each week and delivered. After a while, Atlas Express realised it had underpriced the job and when their driver showed up one week to collect the goods, he presented a new contract to Kafko Ltd which included a price increase. The driver would not load the goods until the contract was signed. Kafko Ltd's manager signed the new contract and the goods were delivered but when Kafko received the invoice from Atlas Express, they only paid the original agreed upon price. Atlas Express sued for BOC.Decision : Def's signature had only been obtained by duress/pressure. He would not have signed had he not been afraid to lose the deal with the other company. Def did not have freedom of choice and the new contract was thus unenforceable and invalid.