Final tweaks on the album were completed in December 2006 in London. A high-quality version was leaked in January 2007 and its contents were confirmed by Okereke. Journalists who obtained an official copy of the album's final mix suggested that it featured electronically tampered rock soundscapes in the vein of Radiohead, New Order, and Björk. Bloc Party previewed "A Weekend in the City" in its entirety on 24 January 2007 at the Bournemouth Old Firestation, a performance which coincided with the Japanese release of the album. The first single, "The Prayer", was released on 29 January. The band performed at a special BBC Radio 1 showcase at Maida Vale Studios on 30 January as a precursor to a February promotional tour of the UK.