Commercial and BBC radio stations around the UK will receive their listening figures at 1:30pm today, detailing audience numbers from Quarter 4 of 2010.
Results are embargoed till midnight, when all results will appear online with group reports, comments and figures analysed at RadioToday.co.uk.
Global Radio is the only group with major changes the quarter, with all former Heart stations coming out of the RAJAR diaries, and their new larger regional names being added. Orion has also added a "Orion Midlands FM" entry too.
KMFM change their reporting period from yearly to half yearly, and BBC Radio Solent has a few less people in their TSA.
Join us for our live chat at midnight, and in-depth reports during the night.