The one time king of the London marketplace, 95.8 Capital Radio, has slipped to fourth position with a smaller audience than Kiss 100.
Bauer Radio is enjoying two out of the three top spots for commercial radio listening in London, with Magic 105.4 attracting 1.918 million listeners and Kiss 100 reaching an audience of 1.583 million.
Global Radio's Heart 106.2 is second in terms of audience reaching 1.85 million listeners, but is number one in terms of market share over Magic 105.3 by just 112,000 hours.
95.8 Capital Radio has increased audience quarter on quarter from 1.517 million to 1.563 million but growth in the audience of Kiss by 154,000 has seen GCap's flagship station slip to fourth in terms of audience, although it remains third in terms of market share.
Steve Parkinson, MD of Kiss, said: "It is a year since we refreshed the sound of the station and put newcomers Rickie and Melvin in at breakfast. Today's results are a great springboard into our £1.5 million investment in summer activity which we hope will deliver still further growth for the newly invigorated Kiss."