In 2005, The Wire declared that he, Richard Youngs and Matthew Bower had "provided the map co-ordinates for much of what passed for a post-punk UK underground during most of the 80s and 90s".
However, it was as a constant member of Nottingham's A Band that he met several future collaborators and first came to the attention of the international underground with an album "Artex/A Lot" being issued on Siltbreeze in the US.
As well as this, he often collaborated with UK noise music/art unit Smell and Quim under the alias D. Foist while also recording with Scottish DIY punk-improv duo Prick Decay on several occasions.
Campbell still found time to guest with Matthew Bower's groups Total and Sunroof!, work with people like Stewart Walden (especially as SWANC - the name taken from their initials), Rob Hayler, Phil Todd (of Ashtray Navigations), Universal Indians and (perhaps inevitably) Campbell Kneale and to record solo albums such as These Premises Are No Longer Bugged and Sol Power.
In 2008, he released an archive CDR of ESP Kinetic material, entitled "Fleck-Nor" As stated above, a complete discography would be virtually impossible to compile.
At time of writing (November 2018), this series is now up to 24 volumes and includes live recordings with Tirath Singh Nirmala (also known as John Clyde Evans), Richard Youngs and Stewart Keith.
The track " Store Keep / Reward Report from the Head", which was originally released by ESP Kinetic in 1985 on cassette was featured on Unassimilated Sounds radio in 2015.