Warner Music Group has become the first major label to sign a pan-European MP3 licensing deal with digital retailer 7digital. It’ll see WMG’s catalogue of DRM-free music rolled out to 7digital’s stores in France, Belgium, Netherlands, Italy and Portugal.Essentially, it’s an extension of existing single-country deals, though, as WMG tracks are already sold through 7digital’s stores in the UK, Ireland, Spain, France, Austria and Germany. 7digital says it’s now selling MP3s in more European countries than any of its rivals.There are knock-on effects, too. 7digital has retail partnerships with several music services, including Spotify and Last.fm. They’ll also benefit from the deal with WMG, since they’ll be able to offer click-to-buy buttons for its artists in the countries covered by the new deal.UPDATE: EMI has contacted Music Ally to point out that it’s had a pan-European deal with 7digital for several years, including DRM-free music.