Next month, Radio 1 will make the biggest change to its schedule since announcing its plan to increase focus on younger listeners. Nick Grimshaw will take over the Radio 1 breakfast show from Chris Moyles in a move that has reignited a long-standing debate; should BBC radio stations target audiences by age? Without doubt, we live in a time when age seems less defining than in previous generations. In a recent interview on Radio 4's Front Row, 64-year-old Vincent Damon Furnier (aka rocker Alice Cooper) declared defiantly "now, 60s, you're in your 40s". And with many hip-hop fans heading towards 50 and thousands of young people attending the Proms, is it right that age remains a factor in targeting and judging BBC services?