U.K. melodic rock act Keane logged 500,000 downloads of its free track "Spiralling" in a week-long promotion.

The song was made available through the band's Web Site, www.keanemusic.com, from Aug. 4.

Universal/Island says the track has become its most popular free download ever, although there are limited comparisons available as U.K. labels do not routinely issue data from such digital promotions. Coldplay's giveaway track "Violet Hill" was downloaded two million times in the week after April 29, according to EMI.

"Spiralling" has now been withdrawn as a free download from www.keanemusic.com and is available to purchase from digital stores. The song has entered the Nielsen Music Control U.K. Radio Airplay Chart at No. 34.

The track features on the band's new album "Perfect Symmetry", which is released on Oct. 13. The trio's third set is preceded by the first single proper, "The Lovers Are Losing".

"Perfect Symmetry" will be the follow-up to 2006's "Under the Iron Sea," which has sold more than 369,000 copies in the United States, according to Nielsen SoundScan.