Trustees' duties — loyalty, care, investment

Trustees' duties are the operational centre of the law of trusts. Earlier weeks asked when a trust exists, how it is constituted, and what purposes equity will recognise. This week asks what follows once a person is trustee. The answer is not a single duty but a structure of obligations: fiduciary duties of loyalty; duties of care, skill and diligence; dispositive and administrative duties under the trust instrument; and statutory duties governing investment, delegation and review.

The organising distinction is between loyalty and care. Loyalty is fiduciary. Its distinctive concern is not merely bad performance but disloyal performance: acting where duty and interest conflict, making unauthorised profits, taking trust opportunities, or preferring one beneficiary for an improper reason. Equity's response is prophylactic. It often imposes liability without proof that the trust suffered loss, and without permitting the trustee to argue that the transaction was fair. This explains Keech v Sandford, Boardman v Phipps and FHR European Ventures LLP v Cedar Capital Partners LLC.

Care is different. A trustee may be perfectly loyal yet careless. Care rules ask whether the trustee acted with the standard of prudence, skill and diligence required in the circumstances. Historically the standard was expressed through the prudent man managing property for others, with greater tolerance for non-professional trustees. The modern law is largely statutory. Section 1 of the Trustee Act 2000 imposes a contextual duty of care, sensitive to special knowledge, professional status and the nature of the function being performed.

Investment is where these ideas meet. Investment decisions are administrative, but they directly affect beneficial enjoyment. Trustees must preserve and enhance trust property, take account of the trust's purposes, balance present and future beneficiaries, diversify where appropriate, obtain proper advice unless unnecessary or inappropriate, and review investments from time to time. The Trustee Act 2000 gives trustees a broad general power of investment, but it does not convert trustees into unconstrained portfolio managers. The power is framed by the standard investment criteria and by fiduciary constraints.

For Cambridge Part II purposes the topic repays close doctrinal separation. Many weak answers collapse all trustee duties into a vague duty to act in beneficiaries' best interests. That phrase is useful only if unpacked. In investment cases it usually means best financial interests, unless the trust's purposes or beneficiaries' circumstances justify a different approach. In loyalty cases it is too blunt: the law often insists on authorisation, disclosure and consent, not on judicial speculation about substantive advantage. In care cases the question is whether the decision-making process and level of skill were adequate, not whether the investment later performed well.

The strongest exam answers therefore proceed in stages: identify the capacity in which the defendant acted; classify the duty as fiduciary loyalty, duty of care, statutory investment duty, or express trust duty; ask whether the trust instrument modifies the default position; consider consent, authorisation and exemption; then address remedy. Liability for breach of loyalty commonly leads to account of profits or constructive trust. Liability for want of care commonly leads to equitable compensation for loss caused to the trust fund. Those remedial consequences reflect the different wrongs.

The history of trustees' duties reflects the movement from a personalised office of confidence to a modern institution of managed property. The early Chancery trustee was not conceived as an entrepreneurial actor. He was a person holding legal title for another and therefore subject to strict obligations of conscience. The court's immediate anxiety was abuse of position. If the trustee could use legal title to obtain advantage for himself, the beneficiary's equitable interest would be precarious. The no-conflict and no-profit rules were therefore articulated with deliberate severity.

Keech v Sandford is the canonical starting point. A trustee holding a lease for an infant beneficiary could not renew it for himself after the landlord refused to renew for the child. The result appears harsh if viewed only as causation or loss: the beneficiary could not have obtained the lease. But equity's concern was institutional. Trustees must not be encouraged to allow trust opportunities to fail and then capture them privately. The case set the tone for a prophylactic jurisdiction in which temptation is itself treated as legally significant.

During the nineteenth century the courts confronted trustees managing more complex assets. Industrialisation, joint stock companies, railways and expanding financial markets made passive preservation inadequate. At the same time, many trustees remained family members or gentlemen acting without reward. The courts consequently developed standards of prudence rather than strict guarantees. Speight v Gaunt accepted that a trustee could employ an apparently respectable broker in the ordinary course of business. Learoyd v Whiteley insisted that trustees invest as ordinary prudent persons would invest for others whom they felt morally bound to provide for, and not as speculators seeking personal gain.

This history also explains the old authorised investment regime. For much of the twentieth century trustees were constrained by statutory lists of approved investments, unless the trust instrument conferred wider powers. The policy was protective but increasingly unrealistic. It privileged nominal safety and state-backed securities, often at the expense of long-term real returns. Inflation and modern portfolio theory exposed the weakness of treating each investment in isolation. A trustee who avoided equities entirely might appear cautious under an older mentality, yet imprudent by contemporary standards if the trust required long-term growth.

The Trustee Act 2000 marks the modern settlement. It replaced list-based caution with a broad power of investment, coupled with duties of care, suitability, diversification, advice and review. The Act reflects modern portfolio thinking without adopting a purely financial model. Trustees must consider the trust's circumstances. The suitability of an investment cannot be assessed abstractly; it depends on the trust's duration, liquidity needs, tax position, distribution policy, beneficiaries' interests and the terms of the instrument.

The history of loyalty and the history of investment are not identical. Loyalty remained strict, as Boardman v Phipps and FHR show. Investment became more flexible and process-driven. This divergence is essential. Equity distrusts conflicted self-dealing even if profitable, but it does not expect investment omniscience. A trustee who honestly obtains advice, diversifies properly, reviews regularly and acts for proper purposes may escape liability despite poor results. Conversely, a trustee who secretly profits from a trust opportunity may be liable even where the beneficiaries are better off.

Cambridge supervision work should keep that historical contrast alive. It prevents two errors. First, it prevents over-moralising investment decisions by treating every bad outcome as breach. Secondly, it prevents under-enforcing loyalty by asking only whether the beneficiaries suffered measurable financial loss. The law of trusteeship has always combined managerial discretion with fiduciary discipline. That combination is the doctrinal signature of the trust.

1. Trustees must act within their powers and for proper purposes. Every duty begins with the trust instrument. The instrument may confer investment powers, authorise remuneration, permit self-dealing, exclude some liabilities, or require particular distributive decisions. But powers are held fiduciarily. A trustee must exercise them for the purposes for which they were conferred, after taking account of relevant considerations and ignoring irrelevant considerations. A formally valid act may still be impeached if the power is misused.

1. Loyalty is the core fiduciary obligation. The trustee must act single-mindedly in the interests of the beneficiaries, or in the case of charitable and purpose trusts in the interests of the trust purposes. Loyalty is not a general duty to be nice, wise or successful. It is a legal discipline directed at conflicts and unauthorised gains. The no-conflict rule restrains trustees from placing themselves in a position where personal interest, or another duty, may conflict with trust duty. The no-profit rule requires trustees to account for unauthorised benefits obtained by reason of their fiduciary position or in circumstances connected with that position.

1. The rules are prophylactic. Equity does not wait for proof of actual corruption. It prevents situations where judgment may be distorted. That is why a trustee who buys trust property may be vulnerable even if the price is objectively fair. It is also why a trustee may have to account for profits made through information or opportunities obtained while acting as trustee. The question is not simply whether the trustee acted honestly. Honesty may affect relief, allowances or exemption, but it does not itself authorise conflict.

1. Authorisation and fully informed consent matter. The strictness of loyalty rules is balanced by the possibility of authorisation. The trust instrument may authorise conflicted transactions. Beneficiaries who are sui juris and absolutely entitled may consent to what would otherwise be breach. The court may also authorise certain transactions. But consent must be fully informed, and the trustee bears the burden of showing adequate disclosure. A beneficiary cannot sensibly consent to a profit whose existence or extent is concealed.

1. Self-dealing and fair-dealing should be distinguished. In the strict self-dealing case a trustee purchases trust property from himself as trustee. The transaction is voidable by beneficiaries almost as of right, because the trustee is on both sides of the transaction. In fair-dealing, the trustee purchases a beneficiary's beneficial interest. The transaction is not automatically set aside, but the trustee must show that he took no advantage, made full disclosure, and gave a fair price. The distinction is practically important in problem questions.

The leading cases fall into three clusters. The first concerns loyalty. Keech v Sandford establishes the strict approach to trust opportunities. The trustee could not renew a lease for himself after failing to obtain renewal for the beneficiary. The case is not best read as a rule about leases. It is a rule about the institutional danger of allowing trustees to exploit opportunities connected with the trust.

Boardman v Phipps is the modern high-water mark of the no-profit rule. A solicitor associated with the trust used information obtained through the trust to acquire shares. The trust benefited substantially, and the defendants acted honestly. The House of Lords nevertheless required an account of profits, while allowing remuneration for skill and effort. The case shows both the strictness and flexibility of equity: strict liability for unauthorised profit, moderated by equitable allowance.

Bristol and West Building Society v Mothew is not a trust case in the narrow sense, but it is indispensable for fiduciary taxonomy. Millett LJ separated fiduciary duties from duties of care, skill and diligence. This matters because remedies and defences differ. Calling every breach by a trustee fiduciary obscures the special function of loyalty.

FHR European Ventures LLP v Cedar Capital Partners LLC resolved a long controversy about bribes and secret commissions. The Supreme Court held that such benefits received by an agent are held on constructive trust for the principal. The reasoning applies strongly to trustees. It favours property-based accountability for disloyal gains, with consequences in insolvency and tracing.

The second cluster concerns care. Speight v Gaunt allowed trustees to employ brokers in the ordinary course of business, provided they acted prudently. It rejects an unrealistic rule that trustees are insurers against every intermediary failure. Learoyd v Whiteley states the classic prudent person approach to investment, emphasising caution in managing property for those to whom one is morally bound. Although the statutory regime has changed, the underlying idea of prudence remains.

The third cluster concerns investment. Cowan v Scargill is often over-cited and under-analysed. Megarry V-C held that pension trustees must put aside personal views and act in beneficiaries' best financial interests. The case is powerful where trustees sacrifice financial welfare for their own political objectives. It is weaker as a universal proposition that trustees can never consider ethical matters. Harries v Church Commissioners supplies the corrective: charitable trustees may avoid investments inconsistent with the charity's purposes, provided they do not significantly jeopardise financial performance.

Nestle v National Westminster Bank illustrates the court's reluctance to impose liability through hindsight. The bank's investment performance was poor over decades, but the claimant failed to establish breach causing loss. The case is nevertheless not an endorsement of inertia. It shows the evidential difficulty of investment claims and the importance of proving what prudent trustees would have done at the time.

Together, these cases teach a disciplined method. Ask first whether the trustee was disloyal, careless, or merely unlucky. Then ask whether the trust instrument or beneficiaries authorised the conduct. Finally, select the remedy appropriate to the wrong. The cases are not interchangeable authorities for a vague duty of best interests.

See practice questions section below.

See further reading section below.