A Weekend in the City (re-release) track listing
"Song for Clay (Disappear Here)" "Hunting for Witches" "Waiting for the 7.18" "The Prayer" "Uniform" "On" "Where Is Home?" "Kreuzberg" "I Still Remember" "Flux" "Sunday" "SRXT"

"Flux" is a song by English rock band Bloc Party. It was released as a single on 12 November 2007 and produced by Jacknife Lee, along with several other new songs, during the band's week in the studio after their performances at the Carling Weekend: Reading and Leeds Festivals. The song uses mostly electronic instruments and features vocalist Kele Okereke's voice manipulated through auto-tune. It was first performed live on 26 September 2007 at Covington's Madison Theater.

CD1 of the set was only released as a free CD through the 14 November 2007 issue of NME. The song peaked at number 8 in the UK Singles Chart as the band's fourth UK Top 10 single. "Flux" is featured on the re-released version of Bloc Party's second studio album A Weekend in the City and on the North American version of their third album Intimacy.

A music video for the song was directed by director Ace Norton, who has previously directed videos for The Willows, Norah Jones and Death Cab for Cutie. The video was published on NME's website on 17 October 2007. Like the Beastie Boys' music video for "Intergalactic", it pays homage to Japanese kaiju movies. It shows two giant silver robots falling in love while other monsters and robots destroy the city they are in. The band themselves do not appear in the video.

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Wikipedia