This document provides an overview of implementation and performance management in the UK government. It discusses the structure of the UK government including the roles of the Prime Minister, Cabinet, and various ministerial departments. It also outlines mechanisms for policy coordination and implementation, including the Implementation Unit and Major Projects Authority. The document reviews efforts around efficiency reform led by the Efficiency and Reform Group, and the government's digital transformation including the GOV.UK website. Finally, it summarizes the Civil Service Reform Plan and its focus on policymaking capability, accountability, skills development, and workforce engagement.