Thanks Sponge
Yeah definitely rocks. In the beginning I was not really happy with the rocks as I kept on thinking that they just did not fit.
But looking at the image that I took yesterday, I actually like the look of it when I look straight on from the front.
I think that when I re-pot it in spring into a new pot, I will try and incorporate the same rocks again and layout although one of the trees from the left hand side will be removed and planted on its own.