Ofcom is the communications regulator in the UK that regulates TV, radio, telecommunications and postal services. It was established in 2003 and operates under Acts of Parliament, with its main duty being to further the interests of citizens and consumers. RAJAR is the official body that measures radio audiences in the UK, established in 1992 by the BBC and RadioCentre to provide a single currency for measuring audiences. It surveys over 300 stations through a sample of 110,000 respondents who keep a diary of their weekly radio listening.