Born John Wardle, Wobble was an old friend of Sex Pistols singer Johnny Rotten. When the Pistols broke up, Rotten formed Public Image Ltd., and Wobble became the bass player. After the group's first few albums, Wobble had a falling out with Rotten (now Lydon) and guitarist Keith Levene and departed for a solo career, also collaborating with artists such as Can members Jaki Liebezeit and Holger Czukay and U2's the Edge. Wobble's solo repertoire ranges from pop to pseudo-reggae to "difficult to listen to" experimentation. In the late '80s, his career took a downward direction, and he had a job sweeping train stations. He began listening to music from places like North Africa, the Middle East, and Eastern Europe and formed Invaders of the Heart with guitarist Justin Adams.