In a music career spanning more than 36 years, Jankel came to prominence in the late 1970s as the guitarist and keyboardist of the rock band Ian Dury and the Blockheads. With Dury, Jankel co-wrote some of the band's best-known songs including "Sex & Drugs & Rock & Roll", "Hit Me with Your Rhythm Stick" and "Reasons to be Cheerful, Part 3".