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RAJAR (Radio Joint Audience Research) is the official body in charge of measuring radio audiences in the UK. It is jointly owned by the BBC and the RadioCentre on behalf of the commercial sector. Data is released quarterly.


The RAJAR Audio MIDAS Survey is designed to provide context and insight into how, when and where audio content is being consumed within the anytime, anywhere, anyhow audio environment; including device usage, activities, location, who listened with. Includes Audio Types such as Podcasts, Live and Catch Up Radio, On Demand Music Services. The nationally representative sample is modelled to project the proportion of the population that does not have broadband access and comprises of over 2,000 former RAJAR respondents who were willing to be re-contacted. MIDAS is collected via an online diary and questionnaire, with data released quarterly.