The Cabinet Office is a department of His Majesty's Government responsible for supporting the prime minister and Cabinet. It is composed of various units that support Cabinet committees and which co-ordinate the delivery of government objectives via other departments. As of December 2021, it has over 10,200 staff, most of whom are civil servants, some of whom work in Whitehall. Staff working in the Prime Minister's Office are part of the Cabinet Office. From Wikipedia
