A hybrid working policy specifies the rules: who comes to the office, on which days, under which conditions. A hybrid working strategy specifies the outcomes: what the hybrid arrangement is intended to achieve (voluntary attendance, productive output, engagement, retention), how those outcomes will be measured, what physical and organisational infrastructure is required to deliver them, and how the strategy will evolve as data reveals what is and is not working. Policy without strategy produces compliance without commitment. Strategy without policy produces intention without clarity. The five keystones in this guide are the components of a complete hybrid working strategy — policy (Keystones 1 and 2) embedded within a broader strategic and physical infrastructure framework (Keystones 3, 4, and 5).