Commercial radio beats BBC in summer numbers for first time since 1990s

Rise in listening hours down to BBC budget cuts and rivals' investment in marketing

Radio fans spent more time listening to commercial stations than the BBC over the first part of the summer - for the first time since the 1990s - as deep-pocketed rivals invest heavily in marketing, poaching talent and launching new services.

Continued budget cuts at the BBC have hampered the corporation's ability to invest in its own services and retain talent with big names from Chris Moyles, Chris Evans, Eddie Mair and, more recently, Andrew Marr, Jon Sopel and Emily Maitlis signing lucrative deals to move to commercial radio rivals.