By UK classics, I take it you mean the 70s stuff? One of the most underrated ones IMO is The Boys – their first two LPs are so good! Also way into The Adverts, Buzzcocks, X-Ray Spex, SLF (technically UK), as well as Crass. I also enjoy Slaughter & The Dogs, Rezillos, The Stranglers, Damned, etc.
Been revisiting the Pistols album in recent years, after literally decades of not wanting to hear it ever again. It's a solid record. Loving The Professionals too.
Incredible Kidda Band thirded, but we're delving more into power pop territory here.
If we're talking early 80s, then fucking DISCHARGE. In capitals.
