“I recognise that a quite different situation might arise where the pension rights available to an employee in connection with his employment were not part of the terms of his contract of employment but arose out of a separate contract between the employee and an insurance company or the trustees of a pension fund. But that is not this case. Here there is no doubt whatever that the terms of the superannuation scheme as laid down in the regulations in force from time to time were embodied in the terms of the contract of employment of each plaintiff. Since the relevant board was in each case the employer upon whom, although acting as agent for the department, all liabilities were imposed by paragraph 2 of the Schedule 1 to the Order of 1972, it seems to me beyond question that the legal obligation, if there was one, to notify the plaintiffs of their rights in relation to the purchase of added years rested in each case on the board, not on the department. Will the law then imply a term in the contract of employment imposing such an obligation on the employer? The implication cannot, of course, be justified as necessary to give business efficacy to the contract of employment as a whole. I think there is force in the submission that, since the employee’s entitlement to enhance his pension rights by the purchase of added years is of no effect unless he is aware of it and since he cannot be expected to become aware of it unless it is drawn to his attention, it is necessary to imply an obligation on the employer to bring it to his attention to render efficacious the very benefit which the contractual right to purchase added years was intended to confer. But this may be stretching the doctrine of implication for the sake of business efficacy beyond its proper reach. A clear distinction is drawn in the speeches of Viscount Simonds in Lister v Romford Ice and Cold Storage Co Ltd[1957] AC 555 and Lord Wilberforce in Liverpool City Council v Irwin[1977] AC 239 between the search for an implied term necessary to give business efficacy to a particular contract and the search, based on wider considerations, for a term which the law will imply as a necessary incident of a definable category of contractual relationship. If any implication is appropriate here, it is, I think, of this latter type. Carswell J accepted the submission that any formulation of an implied term of this kind which would be effective to sustain the plaintiffs’ claims in this case must necessarily be too wide in its ambit to be acceptable as of general application. I believe however that this difficulty is surmounted if the category of contractual relationship in which the implication will arise is defined with sufficient precision. I would define it as the relationship of employer and employee where the following circumstances obtain: (1) the terms of the contract of employment have not been negotiated with the individual employee but result from negotiation with a representative body or are otherwise incorporated by reference; (2) a particular term of the contract makes available to the employee a valuable right contingent upon action being taken by him to avail himself of its benefit; (3) the employee cannot, in all the circumstances, reasonably be expected to be aware of the term unless it is drawn to his attention. I fully appreciate that the criterion to justify an implication of this kind is necessity, not reasonableness. But I take the view that it is not merely reasonable, but necessary, in the circumstances postulated to imply an obligation on the employer to take reasonable steps to bring the term of the contract in question to the employee’s attention, so that he may be in a position to enjoy its benefit. Accordingly I would hold that there was an implied term in each of the plaintiffs’ contracts of employment of which the boards were in each case in breach.”