Amos Nomore wrote:

It looks like a wild water lemon, Passiflora foetida, which is native
to my neck of the woods (SW US). Crush a leaf and see how it smells.
Pretty picture.

Thank you, a quick check of Google and yes it does seem to be that, which
means I will eradicate it, as it is not a native plant, but and introduced
weed (I'm in Australia) I'll check out the leaves next weekend when I go
back up there, just to make to make sure. Once again...thank you.