yes, you are absolutely correct, probably a slav player will play ...c6 going to play a slav anyway, hoping for d4. Personally i play g3 and Bg2 and hold back my central pawns. Ill try and post some lines later as my wife has me painting.
1. c4, c6

Hi tjdiem, all lines are taken from GM Tony Kostens book, the Dynamic English, if you need any details on any of the lines, then please let me know, for thre are too many possibilities to include all the sub variations, regards robbie.

I just discovered this... so too late for my current game where I got into the Accelerated Panov! Yes, 2.g3 is good... but I am also intrigued by the Anglo-Slav, which goes 1.c4 c6 2.Nf3 d5 3.e3 Bg4 4.Qb3. Has anyone looked into that?

No, but I advise on 3.e4, which leads to an interesting gambit.
Can you post a diagram of the gambit and ome of it's ideas? I need an aggressive line against ..c6

Well, in order to take the opportunity, Black plays 3...dxe4 and now White deflects the attack on his Nf3 with Ng5!, attacking e4. From now on, it depends if Black defends e4 with f5 or with Nf6, when White can play Nc3. You should study these lines beforehand with a chess engine, then engage in the actual game. (I'm pretty busy to import a diagram now)
As you might have noticed already, after 1. c4, c6 it's pretty hard to not transpose into the Queen's Gambit or caro-kann. That's why I have devoted this forum to help us be able to keep from transposing. If you play 2. e4, black will probably play 2...d5 transposing into a line in the caro-kann. If you play 2...d4, black will still play 2...d5 transposing into the Queen's Gambit this time. If you are comfortable with the English much more than the Queen's Gambit or caro-kann as white, it might help to play 2. Nc3 or g3 or Nf3. But won't you still transpose? It's very possible that you will transpose, so you need to play carefully to remain in the English. Anyone else want to elaborate on that?