Heartfield is widely regarded as a leading exponent of electronic music both in his hometown (Portsmouth, United Kingdom) and beyond. His tracks, live performances and DJ sets incorporate elements of house, breakbeat, electro and techno amongst many other sounds. Twelve 88 Cartel produced a number of releases between 1986 and on the Bite Back! label, home to the producer of their first European Parliament Jim Shaw of Cranes.
In 1994, Heartfield joined John Peel Session favourites the Psylons as bass player and released one album on Thunderbird Records.
From 1996 to date, Heartfield has concentrated on DJ work and solo composition, as well as on material with fellow Psylons members Keith Wyatt and Jack Packer in live electronic act Seatman Separator. DJ sets have been in established techno clubs such as The Asylum (Soho), Technosis (at Mass, Brixton), Geushky, Phase 2, Vurt and Club 414 (Brixton, London) alongside artists such as Luke Slater, Aubrey, Umek, Alex Paterson, Billy Nasty, Dirty Bass, Justin Swales and Jason Swales.
Collaborations with fellow Techno producers Dave Saunders and Barney Pratt under the name Surefoot have found favour with Carl Cox amongst others In 2005, Heartfield co-produced a remix of Bonemachine’s single Another Day Over with Sigue Sigue Sputnik.
As well as his commercially released material on Hackpen Records, Heartfield distributes many of his own EPs and has contributed extensively to the netlabel Under Your Nose Recordings.
In the last year Heartfield has worked with London"s Mixtape Records and In Deep Recordings with whom he has produced commercially distributed digital and vinyl releases. 2009 has seen the completion of a 20 minute audio-visual piece, "Permanent Way Redux" which was performed as part of the 1000 Plateaus new digital media project and a rework of the cover version of The Kinks"See My Friends" by Brian Poole of Renaldo and the Loaf The last live performance was a 30 minute audio visual piece "In The Lodge" which featured animation from award-winning United States artist Justin Curfman. 2010 saw the release of the 14 track album Venom and Eternity.