great lesson learnt for me here - continue downwind until visual contact can be made with number 1.
in OZ it is not the norm to say "Student and call sign" but is a good idea, I had informed ATC that I was going out on my 2nd Solo before take off however.
looking back it seems so simple just to extend downwind! but I was caught up on the runway change.
I was actually dreding a runway change in flight! and when it happened I could not belive my luck.
any how I have certainly learned more from this post than what my de-breif picked up on.
Thanks to all for input.