What was English rock band 10cc's first UK number-one single?

10cc are an English rock band, formed in Stockport, England, in 1972. The group initially consisted of four musicians – Graham Gouldman, Eric Stewart, Kevin Godley and Lol Creme – who had written and recorded together since 1968. The group featured two songwriting teams. Stewart and Gouldman were predominantly pop songwriters, who created most of the band's accessible songs. Godley and Creme were the predominantly experimental half of 10cc, featuring art and cinematically-inspired writing.

"Rubber Bullets" is a song written by Lol Creme, Kevin Godley, and Graham Gouldman and produced by 10cc. The song was the band's first number one single in the UK Singles Chart, spending one week at the top in June 1973. It also reached No. 1 in Ireland and No. 3 in Australia, but it fared relatively poorly in the United States where it peaked at only No. 73. The single achieved sales of over 50,000 copies in Australia, being eligible for the award of a Gold Disc.