The British Broadcasting Corporation (BBC) is a British public service broadcaster, headquartered at Broadcasting House in the City of Westminster, London. It is the largest broadcaster in the world, with about 23,000 staff. Its main responsibility is to provide public service broadcasting in the United Kingdom, Channel Islands and Isle of Man. The BBC is an autonomous public service broadcaster that operates under a Royal Charter and a Licence and Agreement from the Home Secretary. Within the United Kingdom its work is funded principally by an annual television licence fee, which is charged to all British households, companies and organisations using any type of equipment to record and/or receive live television broadcasts; the level of the fee is set annually by the British Government and agreed by Parliament.