Chaos UK are a UK hardcore punk band formed in 1979 near Bristol. Consisting of Simon on vocals, Andy on guitar, Kaos on bass, and Potts on drums (although the band has been through many different line-ups over the years with Kaos as the only consistent member).

Their lyrics deal with topics such as unemployment, economic recession, drinking, infanticide, distrust of government, the police, and authority in general.After what can be described as the first or classical period, in which the band released two 7inch EP's (1982), contributed to the 'Punk and Disorderly' (1982), 'Riotous Assembly' (1982) and UK/DK (1983) LP/Video samplers and released a self titled LP (1983) Kaos remained the only member.

The second LP, titled 'Short Sharp Shock' (1984), and the 'Radioactive' (1986) split LP which introduced Extreme Noise Terror to the world on Earache Records saw Mower on vocals, Gabba on guitar and Chuck on drums.

This line up is considered the most hard-hitting and most productive and remained more or less unchanged until the late eighties/early nineties, with first Chuck and later Mower leaving. Gabba and Kaos/Chaos (now on vocals) remained at the core of the band.

In their more than 20-year career Chaos UK toured the world (including several Japanese tours, the first of which produced the Live in Japan album) played with bands such as Napalm Death, Extreme Noise Terror, Oi Polloi, The Exploited, Swingin' Utters, Misery, and many others.

They also released over 20 LPs, EPs, singles, splits, and live albums.They split up in 2007, the members moving on to other projects, like A.D. Rice and the Wazzucks, FUK and Sick on the bus. They are still living in Bristol drinking cider, a favorite subject of several songs throughout the band's history.