The Official Subscription Plays Chart (see panel, left) ranks the most-played tracks by UK users of subscription services, based on plays data supplied by Napster, Omnifone (operates the Music Station service), HMV and the Nokia Music Store.

In total the OCC is tracking an average of more than 3.2m plays per week, across 340,000 unique tracks. This compares to the current 2m single-track download sales per week, across an average of 250,000 unique tracks.

Initially the data will comprise a ...