Just thought I'd update this post since I may have made a mistake! I mentioned that it had a triangular stem! I just realised that the id'ing of grass/sedge/reid by stem is referring to the flower stalk!
Lets see if I can explain what I have!
It seems to be climbing ontop of itself! So far its only putting out leaves in 3 directions and the leaves are folded in the center and its giving the stem part a hollow triangular form!
I can wait till it blooms for an id I just wanted to update the post with a few new pics!
I've now got about 8 pups forming around the base, about 4 good sized ones and the rest just emerging.