In 1976, punk rock was a cult phenomenon in the U.S. which somehow blead over to the UK, and got exploded into an outright scene. The song that would be UK Punk's anthem would be provided by The Sex Pistols, when they released "Anarchy In The UK".
Originally released in a plain black sleeve, the single was the only Sex Pistols release for EMI, as the label quickly dropped the band after their vulgar interview with Bill Grundy, which lead to the Filth And The Fury headline in the news the next day. The song reached number 38 on the UK Singles, but the effect of the single was massive as it helped kick the door open for the many punk bands that followed them out into the mainstream, including The Clash and The Damned.
The song was the feature on their album "Never Mind the Bollocks, Here's the Sex Pistols" which helped shape punk rock in the UK for decades after. The song made it to number 56 on Rolling Stone magazine's list of the 500 Greatest Songs of All Time, and has ben included in the Rock and Roll Hall of Fame's 500 Songs That Shaped Rock and Roll.
Ironically the song was not a political statement on UK's government as many thought at the time. John Lydon explained that the best rhyme he could come up with for the first line, "I am an Antichrist", was "I am an anarchist", as the song was more of a reflection of how kids like him were percieved.