It was generally accepted that the House of Lords in Anns v Merton LBC introduced an ‘entirely new type of product liability’ into the law of tort by expanding liability in negligence in relation to the construction of defective buildings. The novelty of the action was to introduce liability in tort for the construction of the defective product itself and to allow a claim for economic loss resulting from the defect. The consequence was to blur some of the traditional boundaries between contract and tort claims and to cause controversy in relation to the nature of the allowable loss recoverable from the negligent act. In particular it led to the question of whether such claims fell into the category of ‘pure economic loss’: a loss not easily accepted in conventional tort jurisprudence.