If you've done Maths and Further Maths without ANY mechanics, you could do Additional Further Maths with M1, 2 and 3.
But you would have to be doing Maths and FM first, and without any mechanics your modules would probably be C1-4, FP1, 2 and 3, S1, S2, S3, S4 and D1. (or you could do D2 instead of S4).
you're right, but obviously the OP said "Is it possible to get an As Level in maths.... ", so for maths those were the only possible combinations...
True
But yeah, they've still got Maths, FM, AFM and PM - all the other random ones like A-level Applied Maths/AS Mechanics etc. have gone though I think on some boards you can still get AS Statistics as a separate qualification and has its own specification - but no doubt there'll be some rules about what you can and can't do with it. It's all a bit confusing, lol.