The boss of Britain's under-fire radio audience measurement service is to step down.

Jane O'Hara, managing director of RAJAR (Radio Joint Audience Research), has decided to leave the post after three-and-a-half years. A successor is being sought.

O'Hara plans to take up long-distance ocean sailing – no doubt a less stressful activity than fending off broadsides from former tabloid editor Kelvin MacKenzie.

MacKenzie – now chairman of Murdoch-controlled radio minnow The Wireless Group – is a vocal critic of RAJAR's diary methodology. He is demanding the introduction of an electronic measurement system, though the audience body has yet to find one that meets all its needs.

Data sourced from:; additional content by WARC staff