Loss of chance in English law refers to a particular problem of causation, which arises in tort and contract. The law is invited to assess hypothetical outcomes, either affecting the claimant or a third party, where the defendant's breach of contract or of the duty of care for the purposes of negligence deprived the claimant of the opportunity to obtain a benefit and/or avoid a loss. For these purposes, the remedy of damages is normally intended to compensate for the claimant's loss of expectation (alternative rationales include restitution and reliance). The general rule is that while a loss of chance is compensable when the chance was something promised on a contract it is not generally so in the law of tort, where most cases thus far have been concerned with medical negligence in the pu