Germ free adolescents!
X-Ray Spex are rapidly becoming one of my favourite punk bands, I suspect it's partly that weakness for brass again but they did as much as any other punk band to break down the walls of the established music industry. I also like the way Poly Styrene often sings the name of the song title before launching into the lyrics.
Both Sex Pistols & X-Ray Spex albums made my seventies list too and are effectively standalone albums that nailed everything the band's wanted to say first time out. Poly Styrene was a true individual who had trained as in opera and turned that into one of the most recognisable voices in contemporary music.