[3] The Pop Group split in 1981, with Stewart and two other members heading off to London to hook up with the emerging On-U Sound "conspiracy of outsiders" as part of the New Age Steppers.

[2] Stewart made several albums under his own name as well as collaborating with artists such as Trent Reznor of Nine Inch Nails fame, Tricky, Massive Attack, Chicks on Speed, ADULT., Algiers and Primal Scream.

"[citation needed] In 2011, Stewart collaborated with New York-based artist-writer Rupert Goldsworthy, forming The New Banalists Orchestra, a collective featuring a host of artists and associates, including John Sinclair (poet), Youth (musician), David Tibet, Penny Rimbaud & Eve Libertine.

The double A-side "Children of the Revolution" / "Nothing Is Sacred" features The Bug, Crass's Eve Libertine, Berlin's Slope and Pop Group bassist Dan Catsis.

Tackling mass media, modern capitalism and consumer apathy,[7] it features a cast including Kenneth Anger, Lee 'Scratch' Perry, Richard Hell, The Raincoats' Gina Birch, Primal Scream, and Clash/PiL guitarist Keith Levene.

Dazed described the show as "an expo where found objects, wall paintings and scrawled writings come together in a ritualistic pile-on of references...an effort to explore cultural myths, symbols, signs and 'radical brands' – the power of representation, charged with dystopian views, prison gates and rioting crowds.

The next year saw Stewart remix both "Space Junk" by The Membranes and "Death Trip To Tulsa" by the Mark Lanegan band whilst also providing vocals for "Schizoid Fairytale", a track by Jim Johnston.

A couple of years later, in 2017, Stewart wrote several tracks for "London Town", an album released by ex-Sugarhill Gang and regular On-U Sound Records cohort Little Axe.

In 2018, Stewart remixed "Ndrangheta Allotment" by Meatraffle and wrote and featured on the track "Stratosphere Girl" on More Disco Songs About Love, the third LP from Los Angeles duo De Lux.