The service, a collaboration with Catch Media which launches in Carphone Warehouse stores across the UK tomorrow (Tuesday), allows users to access their entire digital music collections remotely on their computers or mobile phones.

Using Catch Media's Play Anywhere technology, the system "fingerprints" the user's music collection - essentially making a note of what digital music they possess - and relates this to local partner MediaNet.

The user then installs the Music Anywhere app on his or her handset - ...