Springsteen and Ronson's music will be free online

Bruce Springsteen, Mark Ronson and Leona Lewis are among a number of artists whose back catalogues will be made available for free online after record label Sony BMG signed a deal with music website We7.

In a groundbreaking move, the music giant is the first major label to sign up to the site - which offers music streaming free of charge - and will start making the back catalogues of its best-selling artists available by the end of April.