Cathal Joseph Smyth (born 14 January 1959 in Marylebone, London), also known as Chas Smash, is an English musician, best known as the backing singer, trumpet player and dancer in the ska/pop band Madness. In addition to trumpet, he plays the bass guitar (having initially joined Madness as a bassist), acoustic guitar and other various percussion instruments. He occasionally performs the lead vocals, such as on the songs "Michael Caine", "Wings of a Dove", "One Step Beyond" and "Madness (Is All in the Mind)". He was initially an occasional songwriter, becoming a more regular contributor over the course of Madness's career, and was credited as co-writer on the group's major international hit, "Our House". In 1990, Smyth became an executive for Go Discs. In 2002, Smyth started up his own record label, RGR Music. His solo album A Comfortable Man was released in 2015.