All good points for recorded guitar sounds. For what it's worth, there's some info on this here:
https://www.soundonsound.com/techniques/classic-tracks-sex-pistols-anarchy-ukThat article is specifically focused on "Anarchy in the UK", though I believe the standard release of "God Save the Queen" was recorded and mixed in the same place. As some quick notes, the studio (Wessex Studios) had a Cadac desk (I don't know if anyone's made plugin emulations of those) and the interviewees talk about putting KM84 and SM57 mic about 6" from Jones's amp's speakers (I believe Amplitube has emulations of both mics). The tape machine was a 3M M79 (but I've no idea whether anyone specifically emulates that in a plug-in).
Still, an LP-type guitar with P90s into a cranked model of a Fender Twin (model) with a Dynamic 57 and perhaps a Condenser 84, both backed off just a little, a should be a good start. The console and tape would (probably!) both add some saturation and compression; you could try using the Tube Compressor rack unit so that it was just very, very lightly working.