Formed by Joe Henwood (saxophone) and Tash Keary (drums), O. is a British experimental jazz duo formed in London in 2021. From the outset, O. have distinguished themselves with their raw, explosive sound, blending jazz, punk, electronica and rock. Without bass or guitar, the duo build their universe around powerful percussive grooves, tampered saxophones and intense live energy, inherited as much from free jazz as from underground electronic music. Their critically acclaimed debut album, WeirdOs (June 2024), reached No. 9 in the UK independent charts on its release.