" I have had the advantage of reading all the opinions prepared by " your Lordships and of studying the terms which your Lordships have " framed by way of definition of the sort of relationship which gives " rise to a responsibility towards those who act upon information or " advice and so creates a duty of care towards them. I do not under- " stand any of your Lordships to hold that it is a responsibility imposed " by law upon certain types of persons or in certain sorts of situations. " It is a responsibility that is voluntarily accepted or undertaken, either " generally where a general relationship, such as that of solicitor and " client or banker and customer, is created, or specifically in relation " to a particular transaction ..."
" I shall therefore content myself with the proposition that wherever " there is a relationship equivalent to contract, there is a duty of care. " Such a relationship may be either general or particular. ... I " regard this proposition as an application of the general conception " of proximity. Cases may arise in the future in which a new and " wider proposition, quite independent of any notion of contract, will " be needed. There may, for example, be cases in which a statement " is not supplied for the use of any particular person, any more than " in Donoghue v. Stevenson the ginger beer was supplied for consump- " tion by any particular person; and it will then be necessary to return " to the general conception of proximity and to see whether there can " be evolved from it, as was done in Donoghue v. Stevenson, a specific " proposition to fit the case. ..."
"... the position has now been reached that in order to establish that " a duty of care arises in a particular situation, it is not necessary to " bring the facts of that situation within those of previous situations " in which a duty of care has been held to exist. Rather the question " has to be approached in two stages. First one has to ask whether, " as between the alleged wrongdoer and the person who has suffered " damage there is a sufficient relationship of proximity or neighbour- " hood such that, in the reasonable contemplation of the former, " carelessness on his part may be likely to cause damage to the latter " — in which case a prima facie duty of care arises. Secondly, if the " first question is answered affirmatively, it is necessary to consider " whether there are any considerations which ought to negative, or to " reduce or limit the scope of the duty or the class of person to whom " it is owed or the damages to which a breach of it may give rise. ..."
" The submission is, I think, a formidable one and in my view raises " the most difficult point for decision in this case. Nor can I see any " valid distinction between the case of a builder who carelessly builds " a house which, though not a source of danger to person or property, " nevertheless, owing to a concealed defect in its foundations starts to " settle and crack and becomes valueless, and the case of a manufacturer " who carelessly manufactures an article which, though not a source of " danger to a subsequent owner or to his other property, nevertheless " owing to a hidden defect quickly disintegrates. To hold that either " the builder or the manufacturer was liable except in contract would " be to open up a new field of liability the extent of which could not, " I think, be logically controlled, and since it is not in my judgment " necessary to do so for the purposes of this case I do not, more " particularly because of the absence of the builder, express an opinion " whether the builder has a higher or lower duty than the manufacturer. " But the distinction between the case of a manufacturer of a dangerous " thing which causes damage and that of a thing which turns out to be " defective and valueless lies, I think, not in the nature of the injury " but in the character of the duty. I have a duty not carelessly to put " out a dangerous thing which may cause damage to one who may " purchase it; but the duty does not extend to putting out carelessly a " defective or useless or valueless thing. So again one goes back to " consider what was the character of the duty, if any, owed to the " plaintiff, and one finds on authority that the injury which is one of the " essential elements of the tort of negligence is not confined to physical " damage to personal property but may embrace economic damage " which the plaintiff suffers through buying a worthless thing, as is " shown by the Hedley Byrne case."