Leftfield was a duo of electronica artists and record producers Paul Daley (formerly of The Rivals, A Man Called Adam and the Brand New Heavies) and Neil Barnes, formed in 1989 in London, England. The name Leftfield was originally used simply by Neil Barnes for its first single, "Not Forgotten," but after this, Paul Daley was involved first in remixing songs and then in the creation of following music. The pair were pioneers in the fields of intelligent dance music and progressive house, being among the first to fuse house music with dub and reggae. It furthermore was among the first electronic musicians to incorporate live guest vocalists, along with The Chemical Brothers and Underworld