1980
3R4, mini-LP, Bruce Gilbert and Graham Lewis, 4AD Records, contributed percussion and voice
Cupol, EP, Bruce Gilbert and Graham Lewis, 4AD Records, re-issued on CD, 1991, contributed percussion & treatments
Document & Eyewitness, Wire, LP, Rough Trade Records/Mute Records, re-issued on CD, 1991, contributed spoken word
1981
Dome 3, LP, Dome Records, with Bruce Gilbert and Graham Lewis, Mute Records, re-issued on CD, 1992, and on 3 x LP box set by Editions Mego 2012, contributed voice and percussion
MZUI, LP, Bruce Gilbert, Graham Lewis and Russell Mills, Cherry Red Records, re-issued on CD by LTM, 2003
1982
Dome 4, LP with Bruce Gilbert and Graham Lewis, Mute Records, re-issued on CD 1992*
1983
Only Connect, 7” flexi-disc,Seibu, Tokyo, live recording from Museum of Modern Art, Oxford,with Shinro Ohtake
1994
Between Two Lights, soundwork for Radio Cumbria and installation*
1995
Pacific/Specific (in a different place), CD, WMO Records, with Bruce Gilbert and Graham Lewis, contributed samples, tapes and found sounds
Between Two Lights, soundwork for Hearing is Believing Festival, Liverpool
1996
Measured In Shadows, CD, limited edition installation catalogue, with Ian Walton and Big Block 454
Undark, CD, Time Records, with: Michael Brook, Declan Colgan, Hywel Davies, Edge, Brian Eno, Roger Eno, Robin Guthrie, Bill
Laswell, Kevin Shields, David Sylvian
1997
Sensorama: The Ambient Collection 001, CD, Creative, Undark track ‘Ice In The Sleeve’
1998
Root (for Thurston Moore), LP & CD, Lo Recordings, limited editions, Undark contributed a track ‘Tooth & Claw’
Emit: Beat Exploration, compilation CD, Instinct Records, Undark track ‘Rain In Our Room’
1999
Pearl & Umbra, Russell Mills/Undark, CD, Bella Union Records, with Brian Eno, Roger Eno, David Sylvian, Bill Laswell, Michael Brook, Edge, Robin Guthrie
, Kevin Shields, Hywel Davies, Declan Colgan, Tom Smyth, Ildefonso & Samuel Aguilar, John Aitken, Eraldo Bernocchi, Mark Clifford, Huw Costin, Sussan Deyhim, Mike Fearon, Ali Foster, Peter Gabriel, Graham Haynes, Derek Hook, Graham Lewis, Hamish Mackintosh, Ian McCullough,
Tony McSweeney, Ann Mills, Sam Mills, Thurston Moore, Paul Schutze, Clodagh Simonds, Mitsuo
Tate, Jonny Tomlinson, Emma Townshend, Ian Walton and Hector Zazou
Trace, limited edition CD, Audio Research Editions, Liverpool School of Art, Liverpool John Moores University, for the Liverpool Biennial of Contemporary Art, contributed a track ‘Soft Bullets’ with Mike Fearon and Jonny Tomlinson
Hot Pants Idol, CD, David Toop, Baroni Records, the track ‘Ink Of The Ants’ uses ‘Gleam and Drag’ from Undark Pearl & Umbra
2000
Strange Familiar: Russell Mills/Undark, CD, Bella Union Records, with contributions from MichaelBrook, Declan Colgan, Hywel Davies, Edge, Brian Eno, Roger Eno, Robin Guthrie, Bill Laswell, Kevin Shields and David Sylvian
Republic Of Thorns, limited edition catalogue with CD, the Wordsworth Trust, with Ian Walton and Paul Farley
Zero, limited editionCD, Audio Research Editions, Liverpool School of Art, Liverpool John Moores University, contributed the track
’Time Being’
, with Mike Fearon and Jonny Tomlinson
2002
Red and Blue: Neither Norway, CD, Clearspot Records, Undark re-mixes of ‘Dead Indeed’ and ‘Tragomar’, for Nils Petter Molvaer
Modern Mantra, DJ Spooky: That Subliminal Kid, CD, Shadow Records, Undark track ‘Stone’s Eggs’
12 Tales, compilation CD, Instinct Records, Undark track ‘Rooms Of The Sixteen Shimmers’
At Least You Can Die With A Smile On Your Face, compilation CD, Bella Union Records, Undark track ‘Shed Lustre’
2003
Cleave | Soft Bullets, Limited edition installation catalogue with CD, with Mike Fearon.
2004
Bloody Amateurs, Unknown Public 14, contributed the track ‘Soundings (Edit)’, with Mike Fearon
2011
A History of Background, limited edition CD, Leeds Metropolitan University, contributed the track ‘Static (Edit)’’, with Mike Fearon