A trust only works if the right people hold office and the legal title moves with them, so the statutory rules on changing trustees underpin everything else in trusts law. This chapter starts with the limits on who may serve and how many trustees a trust of land needs, then works through the replacement and additional appointments permitted by s 36 TA 1925, including who has the power to appoint and in what order. It covers the formalities an appointment requires and how s 40 vests trust property in new trustees automatically — and where that shortcut fails. Finally, it deals with leaving office: disclaimer before acceptance, retirement without replacement under s 39, and the routes by which beneficiaries under s 19 TLATA 1996 or the court under s 41 can reshape the trusteeship.