"They are duties in equity imposed in order to ensure that a receiver, while discharging his duties to manage the property with a view to repayment of the secured debt, nonetheless in doing so takes account of the interests of the mortgagor and others interested in the mortgaged property. These duties are not inflexible. What a mortgagee or a receiver must do to discharge them depends upon the particular facts of the particular case. A want of good faith or the exercise of powers for an improper motive will always suffice to establish a breach of duty. What else may suffice will depend upon the facts. Tse Kwong Lam v Wong Chit Sen [1983] 3 All ER 54, [1983] 1 WLR 1349 is a very good example. The fact that the mortgagee had an interest in the purchasing company placed the mortgagee under an obligation to show that a proper price had been obtained. This was an obligation more onerous than would otherwise have been required. It is true that Lord Herschell in Kennedy v de Trafford expressed the duty on the mortgagee in terms much less onerous than the terms in which Salmon LJ expressed the duty in the Cuckmere Brick case. That does not make the two cases inconsistent with one another. The facts that constituted the mortgagors' complaints were different. And the duty in equity appropriate to have been owed by a mortgagee selling in 1888 is not necessarily of the same weight as the duty appropriate to have been owed by a mortgagee selling in 1967. Equity is at least as flexible as the common law in adjusting the duties owed so as to make them fit the requirements of the time.
I do not accept that there is any difference between the answer that would be given by the common law to the question what duties are owed by a receiver managing a mortgaged property to those interested in the equity of redemption and the answer that would be given by equity to that question. I do not, for my part, think it matters one jot whether the duty is expressed as a common law duty or as a duty in equity. The result is the same. The origin of the receiver's duty, like the mortgagee's duty, lies, however, in equity and we might as well continue to refer to it as a duty in equity.
In my judgment, in principle and on the authorities, the following propositions can be stated.
(1) A receiver managing mortgaged property owes duties to the mortgagor and anyone else with an interest in the equity of redemption.
(2) The duties include, but are not necessarily confined to, a duty of good faith.
(3) The extent and scope of any duty additional to that of good faith will depend on the facts and circumstances of the particular case.
(4) In exercising his powers of management the primary duty of the receiver is to try and bring about a situation in which interest on the secured debt can be paid and the debt itself repaid.
(5) Subject to that primary duty, the receiver owes a duty to manage the property with due diligence.
(6) Due diligence does not oblige the receiver to continue to carry on a business on the mortgaged premises previously carried on by the mortgagor.
(7) If the receiver does carry on a business on the mortgaged premises, due diligence requires reasonable steps to be taken in order to try to do so profitably."