The secretary of state for the Home Department, otherwise known as the home secretary, is a senior minister of the Crown in the Government of the United Kingdom. The home secretary leads the Home Office, and is responsible for all national security, policing and immigration policies of the United Kingdom. As a Great Office of State, the home secretary is one of the most senior and influential ministers in the government. The incumbent is a statutory member of the British Cabinet and National Security Council. The post holder is fifth in the ministerial ranking.