During the quarter, listeners switched to the BBC's national stations, as commercial radio lost ground at the national and local level.
National commercial radio's share fell from 11.3% in the last quarter of 2007 to 10.7% in January-March this year, while local commercial radio's share dropped from 31.1% to 30.3%.
In particular, the BBC drained younger listeners away from ad-supported radio, which attracted 50.7% of the listening of the 15-44 age group compared with 53.1% last quarter.
The BBC's three most popular stations all became more so, with Radio 2 growing its share of listening quarter on quarter from 15.7% to 16.5%.
Radio 1 added almost 500,000 listeners to top 11m and increased its share from 10.3% to 10.6%. Radio 4's share grew from 11.8% to 12.2%.
Breakfast DJs Chris Moyles and Terry Wogan each added around 400,000 listeners, with Radio 1 up to 7.72m and Radio 2 up to 8.1m.
In contrast, commercial radio's flagship station Classic FM suffered an unusually large drop in share from 4.2% to 3.7%, although its weekly reach increased slightly to 5.62m people. The Simon Bates breakfast show drew 2.8m listeners, down from 3m in the previous quarter.
The Gold network, also owned by GCap Media, withered with the loss of a quarter of its listeners to 913,000 and a drop in its share from 1.1% to 0.8%.
Global Radio, which is in the process of completing the acquisition of GCap, had a stable quarter. Its Heart network's share dropped slightly from 2.4% to 2.3%, while the Galaxy network remained at 1.6% and LBC rose from 0.9% to 1%.
One of the best performing commercial networks was Smooth Radio, owned by GMG Radio, which increased its share from 1.9% to 2.1% and grew its reach from 2.19m to 2.38m. However, GMG's Real Radio dropped from a 1.8% share to 1.6%.
National AM stations Virgin Radio and TalkSport each lost share, the former going from 1.5% to 1.4% and the latter from 2% to 1.9%.
Bauer Radio's quasi-national network Magic also suffered, dropping from 2.3% to 2.1%.
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