Editor's note: Radio 4's listening figures for the final quarter of 2010 are published tomorrow. Paul Kennedy, Research Director at RAJAR, explains how they're gathered - SB.
RAJAR, or 'Radio t Audience Research', is the official body in charge of radio audience measurement for the UK. RAJAR was established in 1992 to replace two other measurement systems operated separately by the BBC and Commercial Radio. Today RAJAR collects information on behalf of over 300 stations, ranging from very small local services to the national networks...
Read the rest of Paul's primer and leave a comment, on the BBC Radio blog.
