While primarily credited as a guitarist in the early Mekons recordings, Greenhalgh's roles as lead singer and songwriter came to the forefront after the band regrouped and evolved stylistically in the 1980s.

He and Langford appear in Gary Lucas's 1993 video, "Skin the Rabbit," and they share song-writing credits for "On the Streets," featured on The Return of Rico Bell (1996).

Greenhalgh has also performed on the Langford-organised Pine Valley Cosmonauts albums, contributing a cover of Hank Williams's "Angel of Death" to 2003's anti-death penalty benefit, The Executioner's Last Songs Vol.

This band features Therese Daniell on keyboards and guitar, Tam McGibbon on banjo, John Langley on drums and Meiling Daniell-Greenhalgh on vocals and violin.

With Kevin Lycett, Steve Goulding, and John Gill, Greenhalgh has also been a member of Edward II and the Red Hot Polkas, appearing on Let's Polkasteady (1987) and Two Step to Heaven (1989).

With fellow-Mekon Sarah Corina, he has recorded some songs on ukuleles and banjoleles, a sample ("Lowlands of Holland") of which was heard on ResonanceFM's Clear Spot in 2002, a program that also featured Lu Edmonds.