Over on the Observer, there is an excellent article about the Sex Pistols:
The Sex Pistols "Anarchy in the U.K." is More Relevant Now Than Ever
It's a really good look at the classism that drives the song
Plus if you always wondered who the MPLA, UDA, IRA and the "the enemy" (the NME, I found out many years on) are it discusses that too.
It's not my favorite version of the song - I love this live version more:
"GET OFF YOUR ASS!"