Abba star keeps going

Musician Benny Andersson shows no signs of taking it easy, despite his success as a former member of pop group ABBA and with musicals such as Chess and Mamma Mia.

Andersson, 58, has sat at his piano almost daily for the past 40 years, but estimates every month's work generates only four minutes of useable music.

"Most of it is trash," Andersson says. "You have to keep at it to get a good final result."