Leftfield are a British electronic music group formed in 1989, a duo of Neil Barnes and Paul Daley (the latter formerly of The Rivals and A Man Called Adam).

Neil Barnes' music career started off as a DJ at The Wag Club while simultaneously playing percussion on a sessional basis.

[1][4] Described by Barnes as "[t]he sound of 15 years of frustration coming out in one record", the piece was termed "Progressive House" by Mixmag and held significant prominence in nightclubs from 1991 onwards.

(Ice Cool Productions), Supereal, Inner City, Sunscreem, Ultra Naté and provided two remixes to David Bowie's single "Jump They Say".

[2] Leftfield's first major career break came with the single "Open Up", a collaboration with John Lydon (of Sex Pistols fame) that was soon followed by their debut album, Leftism in 1995, blending dub, breakbeat, and house.

Their second album, Rhythm and Stealth (1999) maintained a similar style, and featured Roots Manuva, Afrika Bambaataa and MC Cheshire Cat from Birmingham.

[9] Leftfield headlined RockNess in Dores, Scotland in June 2010, Creamfields in Cheshire, England in August 2010, and played the final set on the main stage at Ireland's three-day festival, Electric Picnic in September.

[14] "Head and Shoulders" features Sleaford Mods on vocals, and its stop-motion and animation hybrid video debuted on Pitchfork on 6 August 2015.

[18] The song "Phat Planet" was used in the "Surfer" TV advertisement for Guinness, ranked number one in Channel 4's Top 100 Adverts list in 2000.

"Phat Planet" was also used in the animated television series Beast Machines: Transformers, the simulation racing games F1 2000 by EA Sports and Racedriver GRID by Codemasters.

In addition, their song "Release the Pressure" was used on advertisements for the O2 mobile phone network at its launch, and the Kerry Group's Cheestrings snack in 2006.