“From these statements [in the Hedley Byrne case] and from their application in Hedley Byrne, we can derive some understanding of the breadth of the principle underlying the case. We can see that it rests upon a relationship between the parties, which may be general or specific to the particular transaction, and which may or may not be contractual in nature. All of their Lordships spoke in terms of one party having assumed or undertaken a responsibility towards the other. On this point, Lord Devlin spoke in particularly clear terms in both passages from his speech which I have quoted above. Further, Lord Morris spoke of that party being possessed of a ‘special skill’ which he undertakes to ‘apply for the assistance of another who relies upon such skill’. But the facts of Hedley Byrne itself, which was concerned with the liability of a banker to the recipient for negligence in the provision of a reference gratuitously supplied, show that the concept of a ‘special skill’ must be understood broadly, certainly broadly enough to include special knowledge. Again, though Hedley Byrne was concerned with the provision of information and advice, the example given by Lord Devlin of the relationship between solicitor and client, and his and Lord Morris’s statements of principle, show that the principle extends beyond the provision of information and advice to include the performance of other services. It follows, of course, that although in the case of the provision of information and advice, reliance upon it by the other party will be necessary to establish a cause of action (because otherwise the negligence will have no causative effect), nevertheless there may be other circumstances in which there will be the necessary reliance to give rise to the application of the principle. In particular, as cases concerned with solicitor and client demonstrate, where the plaintiff entrusts the defendant with the conduct of his affairs, in general or in particular, he may be held to have relied on the defendant to exercise due skill and care in such conduct. In subsequent cases concerned with liability under the Hedley Byrne principle in respect of negligent misstatements, the question has frequently arisen whether the plaintiff falls within the category of persons to whom the maker of the statement owes a duty of care. In seeking to contain that category of persons within reasonable bounds, there has been some tendency on the part of the courts to criticise the concept of ‘assumption of responsibility’ as being ‘unlikely to be a helpful or realistic test in most cases’ (see Smith v Eric S Bush[1990] 1 AC 831 , 864-865 per Lord Griffiths; and see also Caparo Industries plc v Dickman [l990] 2 AC 605, 628, per Lord Roskill). However, at least in cases such as the present, in which the same problem does not arise, there seems to be no reason why recourse should not be had to the concept, which appears after all to have been adopted, in one form or another, by all of their Lordships in Hedley Byrne[1964] AC 465 (see, e.g. Lord Reid, at pp. 483, 486 and 487; Lord Morris (with whom Lord Hodson agreed), at p. 494; Lord Devlin, at pp. 529 and 531; and Lord Pearce at p. 538). Furthermore, especially in a context concerned with a liability which may arise under a contract or in a situation ‘equivalent to contract,’ it must be expected that an objective test will be applied when asking the question whether, in a particular case, responsibility should be held to have been assumed by the defendant to the plaintiff: see Caparo Industries plc v Dickman[1990] 2 AC 605 , 637, per Lord Oliver of Aylmerton. In addition, the concept provides its own explanation why there is no problem in cases of this kind about liability for pure economic loss; for if a person assumes responsibility to another in respect of certain services, there is no reason why he should not be liable in damages for that other in respect of economic loss which flows from the negligent performance of those services. It follows that, once the case is identified as falling within the Hedley Byrne principle, there should be no need to embark upon any further enquiry whether it is ‘fair, just and reasonable’ to impose liability for economic loss – a point which is, I consider, of some importance in the present case. The concept indicates too that in some circumstances, for example where the undertaking to furnish the relevant service is given on an informal occasion, there may be no assumption of responsibility; and likewise that an assumption of responsibility may be negatived by an appropriate disclaimer. I wish to add in parenthesis that, as Oliver J. recognised in Midland Bank Trust Co Ltd v Hett, Stubbs & Kemp[1979] Ch.384 , 416F-G (a case concerned with concurrent liability of solicitors in tort and contract, to which I will have to refer in a moment), an assumption of responsibility by, for example, a professional man may give rise to liability in respect of negligent omissions as much as negligent acts of commission, as for example when a solicitor assumes responsibility for business on behalf of his client and omits to take a certain step, such as the service of a document, which falls within the responsibility so assumed by him.”
“especially in a context concerned with a liability which may arise under a contract or in a situation ‘equivalent to contract’, it must be expected that an objective test will be applied when asking the question whether, in a particular case, responsibility should be held to have been assumed by the defendant to the plaintiff: ...”
“by explaining the logic of my calculation to Mr Treneman it would make it harder for him or the board of Stoves to try to negotiate the offer price upwards without providing some credible basis for arguing that I should alter my basic calculations.”
“SD[Mr O’Driscoll] ... still has his original contemporaneous handwritten note”