The band have now released two lyric videos for the tracks.Watch below.
The band, who will play this year's Olympic closing ceremonyalongside New Order and the Specials, were debuting their first newmusic since 2010.
The quartet, led by Dr Dee creator Damon Albarn,played two songs -Under the Westway and ThePuritan - from a rooftop in West London.
The performances were streamed via the band's website andthe social networking site Twitter.
The "Westway", part of the A40 road through West London whichwas also mentioned in the group's early hit For Tomorrow, canbe seen in the background as the band play.
Between the songs, the band undertook a Twitter question andanswer session with fans, during which they confirmed that the newtracks would be included in their set for next month's Olympicclosing ceremony.