RAJAR stands for Radio Joint Audience Research and 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.
There are currently approximately 310 individual stations on the survey and results are published every quarter.
RAJAR publishes headline trends following publication of the results for Q4 2011.
RAJAR measures listening across all distribution platforms including online. Comparisons are from time to time attempted between RAJAR measuring people and server stats measuring computers. This paper puts things into context and helps you understand why this comparison has many limitations.
At the recent MRG conference held in Malta (November 2010) Jerry Hill, RAJAR's new CEO, talked about the industry's transition from "radio industry" to "audio industry".
Listen to Hill discuss some of the forthcoming changes to the RAJAR survey and also the ways in which RAJAR is exploring new and alternative methods of collecting listening data.
Link courtesy of the Media Research Group.
View the free report to see how many people listen to a station, and for how long.
For a detailed breakdown, including audience by timeband or per demographic, become a subscriber.

This is the entry deadline for a national station, or a local station with an identical TSA to an existing commercial station already on the survey.
Contact us at info@rajar.co.uk or 020 7395 0630 for details.