The band's original lead singer was McGee's younger brother, Owen Paul, but due to other commitments, Paul left the band and was replaced by singer George Porter in 2011.
When Porter left the band, Paul briefly returned then was replaced by Eddie Beggan in June 2012.
Derek Forbes left XSM to join Big Country in 2012 and performed his last gig in Spain in 2013.
After a successful career as two of the original members of Scottish band Simple Minds, ex-members Derek Forbes and Brian McGee formed the partnership they shared in the 1980s, this time under the name XSM (Ex-Simple Minds).
In September 2011, a concert was held in Manila, Philippines together with English new wave band China Crisis.