There is a voluminous literature focusing on the role of non-executive directors, and the contribution they make to company performance. But the UK unitary board structure relies on there being a significant number of executive directors as well. Their role, as directors rather than as managers, is easily overlooked. Appointment to the board should not simply be a feather in the cap of a successful executive, a sign that they’ve reached the top. Promotion to the board brings with it a complex set of duties and responsibilities that are distinct from those of senior managers. How companies prepare their top managers for those additional duties, while ensuring they are kept in balance with the loyalty they rightly owe to the chief executive and their other management colleagues, is a central theme of this paper.