This chapter describes the wide variety of duties that the office of trustee carries. At the heart of trusteeship is the duty to carry out the terms of the trust and to act in the best interests of the beneficiaries at all times. The trustees owe the beneficiaries a duty of care both under common law and statute. Trustees owe a range of duties such as to provide accounts and information and to act unanimously and impartially at all times. The common law governs the right of the beneficiaries to see trust documents in particular the case of Schmidt which held that the court can exercise its discretion as to who can see a trust document. Trustees have a duty to exercise any discretion personally. Trustees do not have to give their reasons for any decision made but where they do so the court has the right to examine the reasons. Trustees have a statutory duty to invest the trust fund and a duty to apply the standard investment criteria which includes the need to consider whether the investments are both suitable and also sufficiently diverse. A trustee has a duty to act personally but may delegate some duties. The Trustee Act 1925 gives the trustees powers to advance both income and capital to beneficiaries.