Only question 3 Five hundred word essay

"The common law developed the law of contract to allow certainty and freedom in commercial dealings. Parliament has, however, intervened to ensure that this freedom to contract is not abused" Explain and discuss this statement in particular with regard to: 1. The sources of English law; 2. The necessary ingredients for an enforceable contract; and the rights of persons who are not party to a contract; 3. The exclusion of liability for personal injury